☆ 4.5 Article

Determination of the E1 component of the low-energy C-12(alpha,gamma)O-16 cross section

PHYSICAL REVIEW C (2010)

期刊

PHYSICAL REVIEW C

卷 81, 期 4, 页码 -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.81.045809

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Physics, Nuclear

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US Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357, DE-FG02-98ER41086]
NSF [PHY-02-16783]

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摘要

A measurement of the beta-delayed alpha decay of N-16 using a set of twin ionization chambers is described. Sources were made by implantation, using a N-16 beam produced via the In-Flight Technique. The energies and emission angles of the C-12 and alpha particles were measured in coincidence and very clean alpha spectra, down to energies of 450 keV, were obtained. The structure of the spectra from this experiment is in good agreement with results from previous measurements. An analysis of our data with the same input parameters as used in earlier studies gives S-E1(300) = 86 +/- 22 keVb for the E1 component of the S-factor. This value is in excellent agreement with results obtained from various direct and indirect measurements. In addition, the influence of new measurements including the phase shift data from Tischhauser et al. on the value of S-E1(300) is discussed.

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Spectroscopy of the T=3/2 A=47 and A=45 mirror nuclei via one- and two-nucleon knockout reactions

S. Uthayakumaar, M. A. Bentley, E. C. Simpson, T. Haylett, R. Yajzey, S. M. Lenzi, W. Satula, D. Bazin, J. Belarge, P. C. Bender, P. J. Davies, B. Elman, A. Gade, H. Iwasaki, D. Kahl, N. Kobayashi, B. Longfellow, S. J. Lonsdale, E. Lunderberg, L. Morris, D. R. Napoli, T. G. Parry, X. Pereira-Lopez, F. Recchia, J. A. Tostevin, R. Wadsworth, D. Weisshaar

Summary: Level schemes of the proton-rich nuclei Mn-47 and Cr-45 have been established for the first time. Mirror energy differences between mirrored states were studied and interpreted using different approaches. The coexistence of spherical and deformed structures near the ground state in Cr-45 provides a stringent test for model predictions.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Direct measurement of the astrophysical 19F(p, αγ) 16O reaction in a deep-underground laboratory

L. Y. Zhang, J. Su, J. J. He, R. J. deBoer, D. Kahl, M. Wiescher, D. Odell, Y. J. Chen, X. Y. Li, J. G. Wang, L. Zhang, F. Q. Cao, H. Zhang, Z. C. Zhang, T. Y. Jiao, Y. D. Sheng, L. H. Wang, L. Y. Song, X. Z. Jiang, Z. M. Li, E. T. Li, S. Wang, G. Lian, Z. H. Li, B. Guo, X. D. Tang, L. T. Sun, Q. Wu, J. Q. Li, B. Q. Cui, L. H. Chen, R. G. Ma, N. C. Qi, W. L. Sun, X. Y. Guo, P. Zhang, Y. H. Chen, Y. Zhou, J. F. Zhou, J. R. He, C. S. Shang, M. C. Li, J. P. Cheng, W. P. Liu

Summary: This experiment reports the full direct measurement results of the 19F(p, alpha gamma)16O reaction, which plays an important role in addressing fluorine abundances in the universe. The experiment has reached an unprecedentedly low energy level and derived astrophysical S factors, showing significant deviations from previous theoretical predictions. Additionally, the contribution of the (p, alpha 0) channel to the total rate has been clarified, providing valuable insights for astrophysical modeling.

PHYSICAL REVIEW C (2022)

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Article Physics, Multidisciplinary

Decay studies in the A ∼ 225 Po-Fr region from the DESPEC campaign at GSI in 2021

M. Polettini, J. Pellumaj, G. Benzoni, G. Zhang, D. Mengoni, R. M. Perez Vidal, D. Genna, A. Bracco, G. Aggez, M. Al Aqueel, B. Alayed, H. M. Albers, A. Algora, S. Alhomaidhi, C. Appleton, T. Arici, M. Armstrong, K. Arnswald, M. Balogh, A. Banerjee, A. Blazhev, S. Bottoni, P. Boutachkov, A. Bruce, C. Bruno, F. Camera, B. Cederwall, M. M. R. Chishti, D. M. Cox, F. C. L. Crespi, B. Das, T. Davinson, G. De Angelis, T. Dickel, M. Doncel, R. Donthi, A. Ertoprak, R. Escudeiro, A. Esmaylzadeh, L. M. Fraile, L. Gaffney, E. R. Gamba, J. Gerl, A. Gottardo, J. Ha, E. Haettner, O. Hall, H. Heggen, Y. Hrabar, N. Hubbard, S. Jazrawi, P. R. John, J. Jolie, C. Jones, D. Joss, D. Judson, D. Kahl, V Karayonchev, E. Kazantseva, R. Kern, L. Knafla, I Kojouharov, A. Korgul, W. Korten, P. Koseoglou, G. Kosir, D. Kostyleva, T. Kurtukian-Nieto, N. Kurz, N. Kuzminchuk, M. Labiche, S. Lenzi, S. Leoni, R. Lozeva, T. J. Mertzimekis, M. Mikolajczuk, B. Million, A. K. Mistry, A. Morales, I Mukha, J. R. Murias, D. Napoli, B. S. NaraSingh, D. O'Donnell, S. E. A. Orrigo, R. Page, S. Pelonis, J. Petrovic, N. Pietralla, S. Pietri, S. Pigliapoco, Zs Podolyak, C. Porzio, B. Quintana Arnes, F. Recchia, P. H. Regan, P. Reiter, K. Rezynkina, P. Roy, M. Rudigier, P. Ruotsalainen, E. Sahin, L. G. Sarmiento, M-M Satrazani, H. Schaffner, C. Scheidenberger, L. Sexton, A. Sharma, J. Smallcombe, A. Sood, P. Vasileiou, J. Vesic, J. Vilhena, L. Waring, H. Weick, V Werner, J. Wiederhold, O. Wieland, K. Wimmer, H. J. Wollersheim, P. Woods, A. Yaneva, I Zanon, J. Zhao, R. Zidarova, S. Ziliani, G. Zimba, A. Zyriliou

Summary: The HISPEC-DESPEC collaboration focuses on investigating the structure of exotic nuclei formed in fragmentation reactions through decay spectroscopy measurements. This paper presents preliminary results from an experiment conducted in spring 2021, with a particular emphasis on beta-decay studies in the Po-Fr nuclei in the 220 < A <230 region of octupole deformation utilizing the DESPEC setup. Ion-beta correlations and fast-timing techniques are utilized to gain insights into this challenging-to-access region.

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS (2022)

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Article Physics, Nuclear

Nature of seniority symmetry breaking in the semimagic nucleus 94Ru

B. Das, B. Cederwall, C. Qi, M. Gorska, P. H. Regan, O. Aktas, H. M. Albers, A. Banerjee, M. M. R. Chishti, J. Gerl, N. Hubbard, S. Jazrawi, J. Jolie, A. K. Mistry, M. Polettini, A. Yaneva, S. Alhomaidhi, J. Zhao, T. Arici, S. Bagchi, G. Benzoni, P. Boutachkov, T. Davinson, T. Dickel, E. Haettner, O. Hall, Ch Hornung, J. P. Hucka, P. R. John, I Kojouharov, R. Knoebel, D. Kostyleva, N. Kuzminchuk, I Mukha, W. R. Plass, B. S. Nara Singh, J. Vasiljevic, S. Pietri, Zs Podolyak, M. Rudigier, H. Roesch, E. Sahin, H. Schaffner, C. Scheidenberger, F. Schirru, A. Sharma, R. Shearman, Y. Tanaka, J. Vesic, H. Weick, H. J. Wollersheim, U. Ahmed, A. Algora, C. Appleton, J. Benito, A. Blazhev, A. Bracco, A. M. Bruce, M. Brunet, R. Canavan, A. Esmaylzadeh, L. M. Fraile, G. Haefner, H. Heggen, D. Kahl, V Karayonchev, R. Kern, A. Korgu, G. Kosir, N. Kurz, R. Lozeva, M. Mikolajczuk, P. Napiralla, R. Page, C. M. Petrache, N. Pietralla, J-M Regis, P. Ruotsalainen, L. Sexton, V Sanchez-Temble, M. Si, J. Vilhena, V Werner, J. Wiederhold, W. Witt, P. J. Woods, G. Zimba

Summary: Lifetime measurements of low-lying states in the semimagic nucleus Ru-94 were conducted using a fast timing detector array. The experiment revealed unexpected enhancements and prohibitive transitions, which provided stringent tests for nucleon-nucleon interactions employed in theoretical model calculations.

PHYSICAL REVIEW C (2022)

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Article Physics, Multidisciplinary

DESPEC Phase-0 campaign at GSI

M. Polettini, S. Jazrawi, M. M. R. Chishti, A. Yaneva, B. Das, A. Banerjee, N. Hubbard, A. K. Mistry, H. M. Albers, R. Shearman, M. Gorska, J. Gerl, P. H. Regan, B. Cederwall, J. Jolie, S. Alhomaidhi, T. Arici, G. Benzoni, P. Boutachkov, T. Davinson, T. Dickel, E. Haettner, O. Hall, H. Heggen, P. R. John, I Kojouharov, N. Kurz, B. S. Nara Singh, S. Pietri, Zs Podolyak, M. Rudigier, E. Sahin, H. Schaffner, C. Scheidenberger, A. Sharma, J. Vesic, H. Weick, H. J. Wollersheim, U. Ahmed, O. Aktas, A. Algora, C. Appleton, J. Benito, A. Blazhev, A. Bracco, A. Bruce, M. Brunet, R. Canavan, A. Esmaylzadeh, L. M. Fraile, H. Grawe, G. Haefner, D. Kahl, V Karayonchev, R. Kern, G. Kosir, R. Lozeva, P. Napiralla, R. Page, C. M. Petrache, J. Petrovic, N. Pietralla, J-M Regis, P. Ruotsalainen, L. Sexton, V Sanchez-Temble, M. Si, J. Vilhena, V Werner, J. Wiederhold, W. Witt, P. Woods, G. Zimba

Summary: This paper reports preliminary results of the DESPEC campaign at GSI, focused on the study of neutron-deficient nuclei approaching Sn-100. The results show isomeric decays of excited states in Pd-96 and Pd-94, with I-pi values of 14(+) and 8(+), respectively. The detailed characterisation of the DESPEC set-up and analysis methodologies, proven in this experimental run, are crucial for future campaigns.

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS (2021)

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Article Physics, Nuclear

Destruction of the cosmic γ-ray emitter 26Al in massive stars: Study of the key 26Al(n, α) reaction

C. Lederer-Woods, P. J. Woods, T. Davinson, A. Estrade, J. Heyse, D. Kahl, S. J. Lonsdale, C. Paradela, P. Schillebeeckx, O. Aberle, S. Amaducci, J. Andrzejewski, L. Audouin, M. Bacak, J. Balibrea, M. Barbagallo, F. Becvar, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Caamano, F. Calvino, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortes, M. A. Cortes-Giraldo, L. Cosentino, S. Cristallo, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I Duran, B. Fernandez-Dominguez, A. Ferrari, P. Ferreira, F. J. Ferrer, P. Finocchiaro, V Furman, K. Goebel, A. R. Garcia, A. Gawlik, S. Gilardoni, T. Glodariu, I. F. Goncalves, E. Gonzalez-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, H. Harada, S. Heinitz, D. G. Jenkins, E. Jericha, F. Kaeppeler, Y. Kadi, A. Kalamara, P. Kavrigin, A. Kimura, N. Kivel, M. Kokkoris, M. Krticka, D. Kurtulgil, E. Leal-Cidoncha, H. Leeb, J. Lerendegui-Marco, S. Lo Meo, D. Macina, A. Manna, J. Marganiec, T. Martinez, A. Masi, C. Massimi, P. Mastinu, M. Mastromarco, E. A. Maugeri, A. Mazzone, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, I Porras, J. Praena, J. M. Quesada, D. Radeck, T. Rauscher, R. Reifarth, C. Rubbia, J. A. Ryan, M. Sabate-Gilarte, A. Saxena, D. Schumann, P. Sedyshev, A. G. Smith, N. Sosnin, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeno-Saldivia, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, S. Warren, C. Weiss, T. Wright, P. Zugec

Summary: This study conducted a new measurement of the neutron destruction reactions of Al-26, providing strengths for ten resonances and calculating astrophysical reactivities for stellar temperatures up to 0.7 GK. The results resolved discrepancies between previous direct measurements and indicate higher stellar destruction rates than previously recommended.

PHYSICAL REVIEW C (2021)

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