☆ 4.8 Article

Determining the rp-Process Flow through 56Ni: Resonances in 57Cu(p,γ)58Zn Identified with GRETINA

PHYSICAL REVIEW LETTERS (2014)

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PHYSICAL REVIEW LETTERS

卷 113, 期 3, 页码 -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevLett.113.032502

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Physics, Multidisciplinary

资金

NSF [PHY11-02511, PHY10-68217, PHY08-22648, NSF1068571]
U.S. DOE Office of Science
DOE [DE-AC02-05CH11231, DE-FG52-08NA28552, DE-SC0004087]
DFG [GE2183/2-1]
MINECO, Spain [FPA2011-29854]
Division Of Physics
Direct For Mathematical & Physical Scien [1068217, 1430152] Funding Source: National Science Foundation

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An approach is presented to experimentally constrain previously unreachable (p,gamma) reaction rates on nuclei far from stability in the astrophysical rp process. Energies of all critical resonances in the Cu-57(p,gamma)Zn-58 reaction are deduced by populating states in Zn-58 with a (d, n) reaction in inverse kinematics at 75 MeV/u, and detecting.-ray-recoil coincidences with the state-of-the-art gamma-ray tracking array GRETINA and the S800 spectrograph at the National Superconducting Cyclotron Laboratory. The results reduce the uncertainty in the Cu-57(p,gamma) reaction rate by several orders of magnitude. The effective lifetime of Ni-56, an important waiting point in the rp process in x-ray bursts, can now be determined entirely from experimentally constrained reaction rates.

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Naik, R. Nair, B. K. Nandi, R. Nania, E. Nappi, A. F. Nassirpour, A. Nath, C. Nattrass, T. K. Nayak, A. Neagu, L. Nellen, S. Nesbo, G. Neskovic, D. Nesterov, B. S. Nielsen, S. Nikolaev, S. Nikulin, V Nikulin, F. Noferini, S. Noh, P. Nomokonov, J. Norman, N. Novitzky, P. Nowakowski, A. Nyanin, J. Nystrand, M. Ogino, A. Ohlson, V. A. Okorokov, J. Oleniacz, A. C. Oliveira Da Silva, M. H. Oliver, A. Onnerstad, C. Oppedisano, A. Ortiz Velasquez, T. Osako, A. Oskarsson, J. Otwinowski, M. Oya, K. Oyama, Y. Pachmayer, S. Padhan, D. Pagano, A. Palasciano, J. Pan, S. Panebianco, J. Park, J. E. Parkkila, S. P. Pathak, R. N. Patra, B. Paul, H. Pei, T. Peitzmann, X. Peng, L. G. Pereira, H. Pereira Da Costa, D. Peresunko, G. M. Perez, S. Perrin, Y. Pestov, V. Petracek, M. Petrovici, R. P. Pezzi, S. Piano, M. Pikna, P. Pillot, O. Pinazza, L. Pinsky, C. Pinto, S. Pisano, M. Planinic, F. Pliquett, M. G. Poghosyan, B. Polichtchouk, S. Politano, N. Poljak, A. Pop, S. Porteboeuf-Houssais, J. Porter, V Pozdniakov, S. K. Prasad, R. Preghenella, F. Prino, C. A. Pruneau, I Pshenichnov, M. Puccio, S. Qiu, L. Quaglia, R. E. Quishpe, S. Ragoni, A. Rakotozafindrabe, L. Ramello, F. Rami, S. A. R. Ramirez, A. G. T. Ramos, T. A. Rancien, R. Raniwala, S. Raniwala, S. S. Rasanen, R. Rath, I Ravasenga, K. F. Read, A. R. Redelbach, K. Redlich, A. Rehman, P. Reichelt, F. Reidt, H. A. Reme-ness, Z. Rescakova, K. Reygers, A. Riabov, V Riabov, T. Richert, M. Richter, W. Riegler, F. Riggi, C. Ristea, M. Rodriguez Cahuantzi, K. Roed, R. Rogalev, E. Rogochaya, T. S. Rogoschinski, D. Rohr, D. Rohrich, P. F. Rojas, S. Rojas Torres, P. S. Rokita, F. Ronchetti, A. Rosano, E. D. Rosas, A. Rossi, A. Roy, P. Roy, S. Roy, N. Rubini, O. Rueda, D. Ruggiano, R. Rui, B. Rumyantsev, P. G. Russek, R. Russo, A. Rustamov, E. Ryabinkin, Y. Ryabov, A. Rybicki, H. Rytkonen, W. Rzesa, O. A. M. Saarimaki, R. Sadek, S. Sadovsky, J. Saetre, K. Safarik, S. K. Saha, S. Saha, B. Sahoo, P. Sahoo, R. Sahoo, S. Sahoo, D. Sahu, P. K. Sahu, J. Saini, S. Sakai, M. P. Salvan, S. Sambyal, V Samsonov, D. Sarkar, N. Sarkar, P. Sarma, V. M. Sarti, M. H. P. Sas, J. Schambach, H. S. Scheid, C. Schiaua, R. Schicker, A. Schmah, C. Schmidt, H. R. Schmidt, M. O. Schmidt, M. Schmidt, N. Schmidt, A. R. Schmier, R. Schotter, J. Schukraft, K. Schwarz, K. Schweda, G. Scioli, E. Scomparin, J. E. Seger, Y. Sekiguchi, D. Sekihata, I Selyuzhenkov, S. Senyukov, J. J. Seo, D. Serebryakov, A. Sevcenco, T. J. Shaba, A. Shabanov, A. Shabetai, R. Shahoyan, W. Shaikh, A. Shangaraev, A. Sharma, H. Sharma, M. Sharma, N. Sharma, S. Sharma, U. Sharma, O. Sheibani, K. Shigaki, M. Shimomura, S. Shirinkin, Q. Shou, Y. Sibiriak, S. Siddhanta, T. Siemiarczuk, T. F. Silva, D. Silvermyr, T. Simantathammakul, G. Simonetti, B. Singh, R. Singh, R. Singh, R. Singh, V. K. Singh, V Singhal, T. Sinha, B. Sitar, M. Sitta, T. B. Skaali, G. Skorodumovs, M. Slupecki, N. Smirnov, R. J. M. Snellings, C. Soncco, J. Song, A. Songmoolnak, F. Soramel, S. Sorensen, I Sputowska, J. Stachel, I Stan, P. J. Steffanic, S. F. Stiefelmaier, D. Stocco, I Storehaug, M. M. Storetvedt, P. Stratmann, C. P. Stylianidis, A. A. P. Suaide, C. Suire, M. Sukhanov, M. Suljic, R. Sultanov, V Sumberia, S. Sumowidagdo, S. Swain, A. Szabo, I Szarka, U. Tabassam, S. F. Taghavi, G. Taillepied, J. Takahashi, G. J. Tambave, S. Tang, Z. Tang, J. D. Tapia Takaki, M. Tarhini, M. G. Tarzila, A. Tauro, G. Tejeda Munoz, A. Telesca, L. Terlizzi, C. Terrevoli, G. Tersimonov, S. Thakur, D. Thomas, R. Tieulent, A. Tikhonov, A. R. Timmins, M. Tkacik, A. Toia, N. Topilskaya, M. Toppi, F. Torales-Acosta, T. Tork, A. Trifiro, S. Tripathy, T. Tripathy, S. Trogolo, V Trubnikov, W. H. Trzaska, T. P. Trzcinski, A. Tumkin, R. Turrisi, T. S. Tveter, K. Ullaland, A. Uras, M. Urioni, G. L. Usai, M. Vala, N. Valle, S. Vallero, L. V. R. van Doremalen, M. van Leeuwen, P. Vande Vyvre, D. Varga, Z. Varga, M. Varga-Kofarago, M. Vasileiou, A. Vasiliev, O. Vazquez Doce, V. Vechernin, E. Vercellin, S. Vergara Limon, L. Vermunt, R. Vertesi, M. Verweij, L. Vickovic, Z. Vilakazi, O. Villalobos Baillie, G. Vino, A. Vinogradov, T. Virgili, V. Vislavicius, A. Vodopyanov, B. Volkel, M. A. Volkl, K. Voloshin, S. A. Voloshin, G. Volpe, B. von Haller, I Vorobyev, D. Voscek, N. Vozniuk, J. Vrlakova, B. Wagner, C. Wang, D. Wang, M. Weber, R. J. G. Weelden, A. Wegrzynek, S. C. Wenzel, J. P. Wessels, J. Wiechula, J. Wikne, G. Wilk, J. Wilkinson, G. A. Willems, B. Windelband, M. Winn, W. E. Witt, J. R. Wright, W. Wu, Y. Wu, R. Xu, A. K. Yadav, S. Yalcin, Y. Yamaguchi, K. Yamakawa, S. Yang, S. Yano, Z. Yin, I-K Yoo, J. H. Yoon, S. Yuan, A. Yuncu, V Zaccolo, C. Zampolli, H. J. C. Zanoli, N. Zardoshti, A. Zarochentsev, P. Zavada, N. Zaviyalov, M. Zhalov, B. Zhang, S. Zhang, X. Zhang, Y. Zhang, V Zherebchevskii, Y. Zhi, N. Zhigareva, D. Zhou, Y. Zhou, J. Zhu, Y. Zhu, G. Zinovjev, N. Zurlo

Summary: The measurements of balance functions (BFs) of identified charged hadron pairs in Pb-Pb collisions at root s(NN) = 2.76 TeV are presented. BF measurements are carried out as two-dimensional differential correlators versus the relative rapidity and azimuthal angle of hadron pairs, and their dependence on collision centrality is studied. The results show that the BF azimuthal widths decrease significantly from peripheral to central collisions, while the longitudinal widths exhibit mixed behaviors. The measurements also provide new constraints for theoretical models of hadron production and transport in heavy-ion collisions.

PHYSICS LETTERS B (2022)

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Article Engineering, Environmental

A mild biomass pretreatment process with efficiency and specificity in co-solvent of γ-valerolactone and aqueous p-toluenesulfonic acid

Xiaoyan Yin, Tingting Cai, Chao Liu, Chen Huang, Jia Wang, Jun Hu, Neng Li, Jianchun Jiang, Kui Wang

Summary: In this study, an environmentally friendly co-solvent pretreatment method for the full utilization of moso bamboo was reported. It efficiently converted lignocellulosic biomass into platform chemicals, providing a sustainable approach for bio-refinery.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Physics, Nuclear

Determination of the 74Ge(p, γ)75As reaction rates in p-process nucleosynthesis with in-beam γ spectroscopy

D. Wu, B. Guo, C. Y. He, W. P. Lin, Z. An, T. L. Ma, F. L. Liu, W. S. Yang, J. H. Wei, Y. C. Li, Y. P. Shen, Q. W. Fan, X. G. Wu, Y. Zheng, T. X. Li, F. Bai, P. Wang, M. L. Qiu, N. Y. Wang

Summary: The Ge-74(p, gamma)As-75 reaction is important for the production of Se-74, a light p-nucleus. Experimental results of the reaction cross sections show good agreement with previous studies and extend measurements to wider energy ranges. Comparisons with theoretical predictions suggest that the EMPIRE-EGSM calculation provides the best description of the data.

NUCLEAR PHYSICS A (2022)

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Article Engineering, Chemical

Elimination of aqueous levetiracetam by a cyclic flow-through electro-peroxone process

Donghai Wu, Ye Shen, Guanghua Lu, Ying Zhou, Chao Zhou

Summary: The study found that the E-peroxone oxidation process was more efficient in removing aqueous LEV compared to individual processes, with significant improvements in LEV removal rate by increasing inlet ozone concentration, applied current, solution initial pH, and cyclic flow rate. Additionally, the combined E-peroxone system accelerated ozone and H2O2 decomposition, leading to enhanced HO center dot formation and treatment efficiency.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

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Article Physics, Nuclear

γ-hadron spectra in p plus Pb collisions at √sNN=5.02 TeV

Man Xie, Xin-Nian Wang, Han-Zhong Zhang

Summary: This study investigates the evolution of a QGP droplet produced in p + A collisions and analyzes gamma-triggered hadron spectra using medium-modified parton fragmentation functions. The initial conditions and space-time evolution of the small QGP droplet were provided by simulations using the superSONIC hydrodynamic model, with parton energy loss described by the high-twist approach in this medium. Numerical results show suppression of gamma-hadron spectra at high transverse momentum in p + Pb collisions at root s(NN) = 5.02 TeV.

PHYSICAL REVIEW C (2021)

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Article Instruments & Instrumentation

Design of the High Rigidity Spectrometer at FRIB

S. Noji, R. G. T. Zegers, G. P. A. Berg, A. M. Amthor, T. Baumann, D. Bazin, E. E. Burkhardt, M. Cortesi, J. C. DeKamp, M. Hausmann, M. Portillo, D. H. Potterveld, B. M. Sherrill, A. Stolz, O. B. Tarasov, R. C. York

Summary: A High Rigidity Spectrometer (HRS) has been designed for experiments at the Facility for Rare-Isotope Beams (FRIB) at Michigan State University (MSU), allowing for the study of exotic neutron-rich isotopes at high beam energies. The HRS consists of a High-Transmission Beamline (HTBL) and a Spectrometer Section, with a maximum magnetic rigidity of 8 Tm.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2023)

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Article Instruments & Instrumentation

Design and construction of a novel energy-loss optical scintillation system (ELOSS) for heavy-ion particle identification

M. Cortesi, S. Dziubinski, A. Gade, R. Zegers, J. Pereira, J. Asciutto, S. Lidia, D. Bazin

Summary: This article presents the development of a novel heavy-ion particle-identification (PID) device based on energy-loss measurement to be used in the S800 spectrograph at the FRIB facility. The new instrument, called ELOSS, consists of a segmented optical detector filled with xenon, surrounded by photomultiplier tubes. It is expected to provide high-resolution AE measurements and timing information, which will have a significant impact on the design and implementation of rare-isotope beam experiments.

REVIEW OF SCIENTIFIC INSTRUMENTS (2022)

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Article Instruments & Instrumentation

Simulations and analysis tools for charge-exchange (d, 2He) reactions in inverse kinematics with the AT-TPC

S. Giraud, J. C. Zamora, R. G. T. Zegers, Y. Ayyad, D. Bazin, W. Mittig, A. Carls, M. DeNudt, Z. Rahman

Summary: Charge-exchange (d,2He) reactions in inverse kinematics at intermediate energies are a promising method for studying Gamow-Teller transition strength in unstable nuclei. A simulation and analysis software based on the ATTPCROOT package was developed to investigate such reactions using the AT-TPC. The software allows for realistic detector response simulation, development of analysis tools, and investigation of space-charge effects in track reconstruction.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (2023)

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Article Physics, Multidisciplinary

& beta; plus Gamow-Teller Strengths from Unstable 14O via the (d, 2He) Reaction in Inverse Kinematics

S. Giraud, J. C. Zamora, R. G. T. Zegers, D. Bazin, Y. Ayyad, S. Bacca, S. Beceiro-Novo, B. A. Brown, A. Carls, J. Chen, M. Cortesi, M. DeNudt, G. Hagen, C. Hultquist, C. Maher, W. Mittig, F. Ndayisabye, S. Noji, S. J. Novario, J. Pereira, Z. Rahman, J. Schmitt, M. Serikow, L. J. Sun, J. Surbrook, N. Watwood, T. Wheeler

Summary: For the first time, the (d, 2He) reaction was successfully used in inverse kinematics to extract the Gamow-Teller transition strength in the & beta; thorn direction from an unstable nucleus. The new technique opens a path to addressing a range of scientific challenges, including in astrophysics and neutrino physics. In this study, the nucleus 14O was examined and its Gamow-Teller transition strength to 14N was extracted, providing insights into the quenching phenomenon.

PHYSICAL REVIEW LETTERS (2023)

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Article Astronomy & Astrophysics

Axial and triaxial degrees of freedom in 72Zn

S. Hellgartner, D. Muecher, K. Wimmer, V. Bildstein, J. L. Egido, R. Gernhaeuser, R. Kruecken, A. K. Nowak, M. Zielinska, C. Bauer, M. L. L. Benito, S. Bottoni, H. De Witte, J. Elseviers, D. Fedorov, F. Flavigny, A. Illana, M. Klintefjord, T. Kroell, R. Lutter, B. Marsh, R. Orlandi, J. Pakarinen, R. Raabe, E. Rapisarda, S. Reichert, P. Reiter, M. Scheck, M. Seidlitz, B. Siebeck, E. Siesling, T. Steinbach, T. Stora, M. Vermeulen, D. Voulot, N. Warr, F. J. C. Wenander

Summary: The unstable nucleus 72Zn with N=42 was studied using multiple safe Coulomb excitation in inverse kinematics. The ground state of 72Zn was found to have an average deformation in the gamma degree of freedom close to maximum triaxiality. The collectivity of the 4+1 state in neutron-rich 72Zn is significantly larger compared to zinc isotopes with N < 40.

PHYSICS LETTERS B (2023)

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Proceedings Paper Astronomy & Astrophysics

A technique for studying (n,p) reactions of astrophysical interest using radioactive beams with SECAR

Pelagia Tsintari, Georg P. A. Berg, Jeff Blackmon, Kelly Chipps, Manoel Couder, Catherine Deibel, Nikolaos Dimitrakopoulos, Ruchi Garg, Uwe Greife, Kirby Hermansen, Ashley Hood, Rahul Jain, Cavan Maher, Caleb Marshall, Zach Meisel, Sara Miskovich, Fernando Montes, Georgios Perdikakis, Jorge Pereira, Thomas Ruland, Hendrik Schatz, Kiana Setoodehnia, Michael Smith, Louis Wagner, Remco G. T. Zegers

Summary: The formation of nuclei in slightly proton-rich regions of neutrino-driven wind in core-collapse supernovae can be explained by the neutrino-p process (nu p-process). Recent studies have identified key (n,p) reactions that control the efficiency of the nu p-process. Measurement of a (n,p) reaction in inverse kinematics was performed with SECAR at NSCL/FRIB, which is difficult due to the nearly identical masses of recoils and unreacted projectiles. The development of new ion beam optics and the installation of a neutron detection system were necessary for this measurement.

NUCLEAR PHYSICS IN ASTROPHYSICS - X, NPA-X 2022 (2023)

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Article Physics, Nuclear

Experimental evidence of the effect of nuclear shells on fission dissipation and time

D. Ramos, M. Caamano, F. Farget, C. Rodriguez-Tajes, A. Lemasson, C. Schmitt, L. Audouin, J. Benlliure, E. Casarejos, E. Clement, D. Cortina, O. Delaune, X. Derkx, A. Dijon, D. Dore, B. Fernandez-Dominguez, G. de France, A. Heinz, B. Jacquot, C. Paradela, M. Rejmund, T. Roger, M. -D. Salsac

Summary: Nuclear fission is a complex physical process with macroscopic and microscopic nuclear properties playing a role in determining the outcome. The presence of nuclear dissipation has a significant impact on the process, but it is poorly understood due to different theoretical interpretations and limited experimental data. This study presents the first experimental determination of dissipation energy in fission, revealing the influence of particular nuclear shells on dissipation and fission dynamics.

PHYSICAL REVIEW C (2023)

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Article Astronomy & Astrophysics

Hexadecapole strength in the rare isotopes 74,76Kr

M. Spieker, S. E. Agbemava, D. Bazin, S. Biswas, P. D. Cottle, P. J. Farris, A. Gade, T. Ginter, S. Giraud, K. W. Kemper, J. Li, W. Nazarewicz, S. Noji, J. Pereira, L. A. Riley, M. Smith, D. Weisshaar, R. G. T. Zegers

Summary: Inelastic proton scattering experiments in inverse kinematics were performed on the rare isotopes 74,76Kr to study their structure. The focus was on the J pi = 4+1 states and the hexadecapole degree of freedom. By performing coupled-channels calculations, deformation parameters /34 for the Kr isotopes were determined, and two possible solutions were found. Comparisons to predictions from nuclear energy density functional theory favored large, positive /34 solutions, which are linked to well deformed prolate configurations. The /34 values may serve as sensitive measures of the nuclear shell structure.

PHYSICS LETTERS B (2023)

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Article Physics, Nuclear

Cross-section measurement of the 82Kr(p, ?)83Rb reaction in inverse kinematics

A. Tsantiri, A. Palmisano-Kyle, A. Spyrou, P. Mohr, H. C. Berg, P. A. DeYoung, A. C. Dombos, P. Gastis, E. C. Good, C. M. Harris, S. N. Liddick, S. M. Lyons, O. Olivas-Gomez, G. Owens-Fryar, J. Pereira, A. L. Richard, A. Simon, M. K. Smith, R. G. T. Zegers

Summary: The total cross section of the 82Kr(p, gamma)83Rb reaction was measured for the first time at effective center-of-mass energies between 2.4 and 3.0 MeV, which are relevant to the astrophysical gamma process. The experiment was conducted using the ReA facility at the National Superconducting Cyclotron Laboratory in Michigan State University. A 82Kr beam was directed onto a hydrogen gas cell located at the center of the Summing NaI(Tl) (SuN) detector. The obtained spectra were analyzed using the gamma-summing technique, revealing that the standard statistical model calculations overestimate the cross section of the 82Kr(p, gamma)83Rb reaction compared to the experimental measurements. The experimental data also provided additional constraints on the nuclear level density and the gamma-ray strength function used in the statistical model calculations.

PHYSICAL REVIEW C (2023)

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Article Physics, Nuclear

Relative population of states in 21Mg from few-nucleon removal reactions

B. Longfellow, A. Gade, D. Bazin, P. C. Bender, M. Bowry, B. A. Brown, B. Elman, E. Lunderberg, D. Rhodes, M. Spieker, D. Weisshaar, S. J. Williams

Summary: Intermediate-energy nuclear reactions involving the removal of three, four, and five nucleons can proceed through nondissipative and statistical processes. In this experiment at the National Superconducting Cyclotron Laboratory, gamma-ray spectroscopy was used to study few-nucleon removal reactions from different projectile beams to the same reaction product. The results showed significant differences in the population of states in the reaction product, which were correlated with the spins of the states. This intermediate regime may have the potential to produce unique level populations in fast-beam experiments and alter isomer to ground state ratios.

PHYSICAL REVIEW C (2023)

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Article Astronomy & Astrophysics

Large collectivity in 29Ne at the boundary of the island of inversion

A. Revel, J. Wu, H. Iwasaki, J. Ash, D. Bazin, B. A. Brown, J. Chen, R. Elder, P. Farris, A. Gade, M. Grinder, N. Kobayashi, J. Li, B. Longfellow, T. Mijatovic, J. Pereira, A. Poves, A. Sanchez, N. Shimizu, M. Spieker, Y. Utsuno, D. Weisshaar

Summary: The heavy-ion inelastic scattering of neutron-rich nucleus 29Ne to its excited states was studied using a 100.1 MeV/u 29Ne rare isotope beam. The simultaneous measurements of the two inelastic reactions were conducted, providing the first measurement of transition strengths for this isotope. A significant E2 strength in the excitation to the 931-keV state was observed, indicating a large degree of collectivity.

PHYSICS LETTERS B (2023)

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Article Physics, Nuclear

Spin inhibition in γ-decay probabilities for states above Sn in Sm and Dy nuclei

C. S. Reingold, A. Simon, R. O. Hughes, J. T. Harke, K. A. Chipps, S. Burcher, D. T. Blankstien, J. A. Cizewski, N. Cooper, M. Hall, S. Ota, B. Schroeder, S. Upadhyayula

Summary: When a highly excited nucleus in a high-spin state cannot conserve angular momentum through neutron emission, it undergoes de-excitation via gamma-ray emission instead. The spin inhibition phenomenon provides insights into the compound nucleus structure and the distribution of spin states in compound nuclear reactions.

PHYSICAL REVIEW C (2022)

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