Article
Physics, Nuclear
A. Mukherjee, S. Bhattacharya, T. Trivedi, S. Tiwari, R. P. Singh, S. Muralithar, K. Yashraj, K. Katre, R. Kumar, R. Palit, S. Chakraborty, S. Jehangir, Nazira Nazir, S. P. Rouoof, G. H. Bhat, J. A. Sheikh, N. Rather, R. Raut, S. S. Ghugre, S. Ali, S. Rajbanshi, S. Nag, S. S. Tiwary, A. Sharma, S. Kumar, S. Yadav, A. K. Jain
Summary: Transverse wobbling in the 151Eu nucleus was studied by exciting the excited states using the 148Nd(7Li, 4n)151Eu reaction at a beam energy of 30 MeV. Three new interconnecting transitions were found between the negative parity bands. The M1/E2 character of these transitions was determined using the mixing ratios and the RDCO and linear polarization method, and the spin and parity of different bands were assigned. The dominant E2 character between the yrast and first phonon wobbling band and the dominant M1 character between the yrast band and its signature partner band indicate the presence of transverse wobbling in the 151Eu nucleus. The observed experimental properties were successfully described using the triaxial projected shell model approach.
Article
Physics, Nuclear
B. F. Lv, C. M. Petrache, R. Budaca, A. Astier, K. K. Zheng, P. Greenlees, H. Badran, T. Calverley, D. M. Cox, T. Grahn, J. Hilton, R. Julin, S. Juutinen, J. Konki, J. Pakarinen, P. Papadakis, J. Partanen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Saren, C. Scholey, J. Sorri, S. Stolze, J. Uusitalo, B. Cederwall, A. Ertoprak, H. Liu, S. Guo, J. G. Wang, H. J. Ong, X. H. Zhou, Z. Y. Sun, I Kuti, J. Timar, A. Tucholski, J. Srebrny, C. Andreoiu
Summary: The nature of two high-spin bands in Nd-136, which are predicted to be good candidates for transverse wobbling bands, is investigated experimentally. The mixing ratio of a transition connecting the one-phonon and the zero-phonon wobbling bands is determined using angular correlation and linear polarization method. The results confirm the transverse wobbling nature of the bands, in agreement with a particle-rotor model.
Article
Physics, Nuclear
R. Budaca
Summary: The study focuses on the transverse wobbling motion in odd-A nuclei using a semiclassical treatment with a triaxial rotor Hamiltonian. An additional spin-spin interaction is introduced to account for rotational alignment mechanism and generalize the quasiparticle-rotor coupling, with investigation into its effect on rotation dynamics in a classical mainframe. The quantum realization of excitations associated with transverse wobbling regime in the presence of additional alignment is achieved in a harmonic approximation, with the quality of the approximation examined in a general theoretical context.
Article
Physics, Nuclear
R. Budaca, C. M. Petrache
Summary: In this study, the wobbling motion in even-even nuclei is investigated by constructing a collective Hamiltonian and discussing the limits of distinct wobbling regimes. Model calculations were performed for the description of transverse wobbling bands in Ba-130, Ce-134, and Nd-136, Nd-138 nuclei.
Article
Physics, Nuclear
C. Broocks, Q. B. Chen, N. Kaiser, Ulf-G. Meissner
Summary: The g-factor and static quadrupole moment of Pr-135, Pd-105, and Au-187 in wobbling motion were investigated as functions of the total spin I. The g-factor of Pd-105 increases with increasing I, while the g-factor of Pr-135 and Au-187 decreases. The static quadrupole moment shows variations among the three nuclides depending on the band structure.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Astronomy & Astrophysics
A. Alonso Izquierdo, J. Queiroga-Nunes, L. M. Nieto
Summary: In this paper, numerical investigations were conducted on the scattering between a wobbling kink and a wobbling antikink in the standard phi(4) model. The study discussed the dependence of final velocities, wobbling amplitudes, and frequencies of the scattered kinks on collision velocity and initial wobbling amplitude. The fractal structure becomes more intricate with the emergence of new resonance windows and the splitting of those arising in non-excited kink scattering. Outside this phase, the final wobbling amplitude shows a linear dependence on collision velocity, which is almost independent of the initial wobbling amplitude.
Article
Multidisciplinary Sciences
Bingfeng Lv, Costel Marian Petrache
Summary: Wobbling motion without axial symmetry in nuclei has been extensively studied in recent years. The discovery of transverse wobbling in 135Pr and other nuclei was considered significant, but both experimental results and theoretical models were questioned. New experimental evidence contradicts the wobbling interpretation of low-spin bands in Pr-135, while supporting the existence of transverse wobbling in medium-spin bands in triaxial even-even nuclei such as Nd-136.
Article
Astronomy & Astrophysics
Noam Dori, Ealeal Bear, Noam Soker
Summary: We have found that the convective motion in the envelopes of red supergiant (RSG) stars contributes a significant stochastic angular momentum to the mass accreted by a secondary star in a common envelope evolution (CEE), causing the wobbling of the jets launched by the secondary star. Through stellar evolution simulations, we have determined that the stochastic convection motion in the RSG envelope adds a random component to the angular momentum of the accreted mass, which is about 0.1-1 times the constant component due to the orbital motion. This stochastic angular momentum leads to the wobbling of the accretion disk and jets, making it more difficult for them to break out from the envelope and shaping small bubbles in the ejected nebula.
ASTROPHYSICAL JOURNAL
(2023)
Article
Automation & Control Systems
Hye-Seul Yoon, Hee-Seon Bang
Summary: By adjusting the amplitude, the joint area and strength of aluminum and copper materials in lithium-ion batteries can be increased through IR laser welding.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Astronomy & Astrophysics
H. Jia, S. Y. Wang, B. Qi, C. Liu, L. Zhu
Summary: In this study, the mixing ratios of Delta the Delta I = 1 linking transitions in the chiral and multiple chiral doublet bands were analyzed for the first time using the quantum particle rotor model. The calculated results showed that the Delta I = 1 linking transitions in the lowest and excited chiral doublet bands were of pure M1 character, while those connecting the excited to lowest chiral doublet bands had an M1/E2 character with a relatively large E2 admixture. Further analysis of the angular momentum geometry and azimuthal plots revealed that the excited chiral doublet bands represented a chiral geometry with a wobbling motion of the core, providing a possible figure of wobbling motion in multiple chiral doublets.
Article
Astronomy & Astrophysics
K. Rojeeta Devi, Suresh Kumar, Naveen Kumar, Neelam, F. S. Babra, Md S. R. Laskar, S. Biswas, S. Saha, P. Singh, S. Samanta, S. Das, S. Chakraborty, R. P. Singh, S. Muralithar, A. Kumar
Summary: The low-lying negative parity states in the Ba-133 nucleus were studied, revealing the presence of wobbling bands with transverse nature. The experimental results confirmed the predominant E2 character in the inter-linking transitions between wobbling bands with adjacent phonons.
Article
Mathematics, Applied
Guillermo H. Goldsztein
Summary: The Millennium Bridge in London opened to the public on June 10, 2000 but had to be closed just three days later due to wobbling issues. After modifications were made to prevent the wobbling, the bridge reopened. To understand the physics behind this phenomenon, researchers developed and studied a toy model of a pedestrian-bridge system. The model revealed that when the natural frequency of the bridge matched the walking frequency of the pedestrian, the lateral oscillations of both would synchronize in antiphase. The model also predicted the amplitude of the bridge oscillations.
SIAM JOURNAL ON APPLIED MATHEMATICS
(2022)
Article
Geosciences, Multidisciplinary
Ming Hao, Qingliang Wang, Peizhen Zhang, Zhangjun Li, Yuhang Li, Wenquan Zhuang
Summary: The study reveals that the Ordos block exhibits rigid motion with negligible anticlockwise rotation; there is no significant differential motion and strain within the block, but it is influenced by adjacent blocks moving in different directions at different rates; deformation caused by adjacent blocks mainly occurs along the boundaries of grabens and fold-thrust fault zones.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Minjung Kang, Yeonho Kwak, Hyeonjeong You, Sanghoon Kang, Cheolhee Kim
Summary: During laser overlap welding of high strength steels, a wide interface-bead width is necessary to ensure joint strength. This study employed single-mode laser and beam wobbling techniques to achieve the desired bead width while minimizing heat input.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Physics, Particles & Fields
Joao G. F. Campos, Azadeh Mohammadi
Summary: In this study, we investigated the collision of kink and antikink in the double sine-Gordon model with and without the excited vibrational mode. We found that the vibrational mode's initial excitation can lead to the energy converting into translational energy after the collision, resulting in a rich structure of resonance windows dependent on the wobbling phase and amplitude. The study also revealed modified structures of one-bounce windows throughout the parameter range and the increasing resonant interval with higher-bounce windows as the wobbling amplitude grows. The final wobbling frequency of the kinks was Lorentz contracted, and the maximum energy density value behaved smoothly in the resonance windows.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Spectroscopy
Nishat Rathore, Sujit K. Tandel
Summary: X-ray fluorescence measurements have revealed the elemental composition of around 60 items of jewelry in the Indian retail market, showing significant amounts of toxic elements such as bromine and antimony in fashion jewelry, as well as carcinogenic cadmium as the predominant constituent in non-precious metal imitation jewelry. The study emphasizes the urgent need to inspect and regulate the jewelry business in order to mitigate the harmful effects of these constituent elements on human health and the environment.
X-RAY SPECTROMETRY
(2022)
Article
Engineering, Electrical & Electronic
Robert M. Zedric, Craig M. Marianno, Sunil S. Chirayath, Yacouba Diawara, Iain Darby
Summary: Understanding the radiation effects on avalanche photodiodes (APDs) is crucial for their applications in harsh radiation environments. Research has shown that certain combinations of irradiation flux and reverse bias can increase the charge collection efficiency (CCE) of APDs, leading to a defect-enhanced charge multiplication (DECM) phenomenon. DECM is expected to occur in other devices with high electric fields causing impact ionization.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2022)
Article
Chemistry, Physical
Edgar van Loef, Lakshmi Soundara Pandian, Guido Ciampi, Luis Stand, Mao-Hua Du, Daniel Rutstrom, Mariya Zhuravleva, Charles Melcher, Kanai Shah
Summary: This paper presents the crystal growth, density functional theory (DFT) calculations and scintillation properties of TlMgX3 (X = Cl, Br, I). Crystals with diameters up to 16 mm and lengths up to 25 mm were grown using the Vertical Bridgman technique. TlMgCl3 and TlMgBr3 crystals belong to the Perovskite family and have an orthorhombic crystal structure. TlMgI3, as a congruently melting composition, does not exist and possibly forms Tl2MgI4 instead.
Article
Engineering, Electrical & Electronic
Edgar van Loef, Lakshmi Soundara Pandian, Nathaniel Kaneshige, Guido Ciampi, Luis Stand, Daniel Rutstrom, Yauhen Tratsiak, Mariya Zhuravleva, Charles Melcher, Kanai S. Shah
Summary: In this article, crystal growth, density functional theory (DFT) calculations, and scintillation properties of TlCaX3 (X = Cl, Br, I) are reported. Crystals were grown using the vertical Bridgman technique. TlCaCl3, TlCaBr3, and TlCaI3 crystals belong to the perovskite family and have an orthorhombic crystal structure. All three compositions exhibit bright emission under X-ray excitation at different wavelengths. The light yield increases in the series Cl < Br < I [25 000-47 000 photons/MeV (ph/MeV)].
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Nathaniel Kaneshige, Lakshmi Soundara Pandian, Kyle Werra, Josh Tower, Jarek Glodo, Erik Johnson, Michael P. Dion, Irakli Garishvili, Greg Westphal, Louise G. Worrall, Michael R. Squillante, Kanai Shah
Summary: The Cs2LiLa(Br,Cl)(6):Ce (CLLBC) scintillator is a dual-mode scintillator that can detect gamma rays and discriminate them from neutrons. We investigated the gamma and neutron detection performance of CLLBC scintillators from 25 degrees C to 200 degrees C. The results showed that the light yield for gamma events responded well to temperature changes, while the light yield for neutron-capture events decreased from 100% to 76% at 200 degrees C. When integrated with a high-temperature photomultiplier, we achieved energy resolutions of 7.8% for 662 keV gammas and 4.2% for neutron-capture events at 175 degrees C, together with a PSD FOM of 0.74.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2023)
Article
Physics, Nuclear
A. Mattera, E. A. McCutchan, S. Zhu, C. Morse, M. P. Carpenter, P. Copp, C. Muller-Gatermann, W. Reviol, J. P. Greene, M. Gott
Summary: This study focuses on the identification and quantification of fission product 131I using the activation technique. The study successfully improved the uncertainty in intensity measurements and resolved discrepancies in literature values. Additionally, the study determined spin assignments for excited levels and mixing ratios for gamma-ray transitions using detailed angular correlation analysis.
Article
Physics, Nuclear
Saket Suman, S. K. Tandel, S. G. Wahid, T. Manu, M. Hemalatha, B. Maheshwari, A. K. Jain, P. Chowdhury, R. V. F. Janssens, F. G. Kondev, M. P. Carpenter, T. Lauritsen, D. Seweryniak
Summary: The negative-parity band structure built on the proton h(9/2) state in Tl-199 has been established, with rotation alignments observed at frequencies of 0.22 and 0.30 MeV, which are attributed to the breaking of pairs of neutrons in the i(13/2) subshell.
Article
Physics, Nuclear
Javier Rufino Jr, E. A. McCutchan, S. Zhu, A. A. Sonzogni, M. Alcorta, P. F. Bertone, M. P. Carpenter, J. Clark, C. R. Hoffman, R. V. F. Janssens, F. G. Kondev, T. Lauritsen, C. J. Lister, R. Pardo, A. Rogers, G. Savard, D. Seweryniak, R. Vondrasek
Summary: This study investigates the decay of the fission fragment Ba-141 to understand the beta-decay strength function of nuclides produced in fission. Different experimental techniques were used, and the results were compared with previous studies, showing excellent agreement and providing a benchmark for further understanding the structure of La-141.
Article
Physics, Nuclear
A. D. Ayangeakaa, N. Sensharma, M. Fulghieri, R. V. F. Janssens, Q. B. Chen, S. Zhu, M. Alcorta, M. P. Carpenter, P. Chowdhury, A. Gade, C. R. Hoffman, F. G. Kondev, T. Lauritsen, E. A. McCutchan, A. M. Rogers, D. Seweryniak
Summary: This study investigates single-particle and collective excitations in Zn-66 via a multinucleon transfer reaction. A new quasirotational band is found and the low-spin structure is successfully described.
Article
Physics, Nuclear
N. Sensharma, A. D. Ayangeakaa, R. V. F. Janssens, Q. B. Chen, S. Zhu, M. Alcorta, M. P. Carpenter, E. A. McCutchan, F. G. Kondev, T. Lauritsen, D. Seweryniak, C. R. Hoffman, A. M. Rogers, A. Gade, T. Baugher, P. Chowdhury
Summary: Extensive study of the level structure of 62Co has been conducted using a complex multinucleon transfer reaction. The study observed various level sequences and proposed an interpretation within the framework of the spherical shell model. Two dipole bands with possible magnetic rotation character were found at moderate spins.
Article
Physics, Nuclear
V Bothe, S. K. Tandel, S. G. Wahid, P. C. Srivastava, Bharti Bhoy, P. Chowdhury, R. V. F. Janssens, F. G. Kondev, M. P. Carpenter, T. Lauritsen, D. Seweryniak, S. Zhu
Summary: Isomers with three- and five-nucleon-hole configurations have been established in 203Tl. The levels above the long-lived isomer have been identified through a delayed-prompt γ-γ coincidence measurement. Empirical and shell-model calculations were performed to describe the observed states which are found to be of intrinsic character.
Article
Physics, Nuclear
G. Lotay, D. T. Doherty, R. V. F. Janssens, D. Seweryniak, H. M. Albers, S. Almaraz-Calderon, M. P. Carpenter, A. E. Champagne, C. J. Chiara, C. R. Hoffman, C. Iliadis, A. Kankainen, T. Lauritsen, S. Zhu
Summary: The gamma-decay properties of an excited state in Al-26 at 6398.3(8) keV have been reexamined. The relative branching to the Al-26 ground state was determined to be 0.76 +/- 0.03 (stat.) +/- 0.10 (syst.), indicating a considerable increase in the production of cosmic gamma rays from Al-26 radioactivity.
Article
Physics, Nuclear
D. Ivanova, S. Lalkovski, C. Costache, S. Kisyov, C. Mihai, N. Marginean, P. Petkov, L. Atanasova, D. Bucurescu, R. B. Cakirli, M. P. Carpenter, R. F. Casten, Gh Cata-Danil, I Cata-Danil, D. Deleanu, D. Filipescu, N. Florea, I Gheorghe, D. Ghita, T. Glodariu, F. G. Kondev, R. Lica, R. Marginean, A. Negret, S. Pascu, T. Sava, E. A. Stefanova, L. Stroe, G. Suliman, R. Suvaila, O. Yordanov, N. Zamfir
Summary: The structure and decay patterns of odd-mass Pd99-105 nuclei were investigated, and a reasonable explanation was provided using the rigid triaxial rotor plus particle model.
Article
Physics, Nuclear
A. Chester, B. A. Brown, S. P. Burcher, M. P. Carpenter, J. J. Carroll, C. J. Chiara, P. A. Copp, B. P. Crider, J. T. Harke, D. E. M. Hoff, K. Kolos, S. N. Liddick, B. Longfellow, M. J. Mogannam, T. H. Ogunbeku, C. J. Prokop, D. Rhodes, A. L. Richard, O. A. Shehu, A. S. Tamashiro, R. Unz, Y. Xiao
Summary: This study confirmed the existence of a 34 ns isomeric state in Ga-76, which is formed by the coupling of protons in negative-parity configurations to 1/2(-) neutron configurations.
Article
Physics, Nuclear
D. J. Hartley, F. G. Kondev, M. P. Carpenter, R. V. F. Janssens, M. A. Riley, K. Villafana, K. Auranen, A. D. Ayangeakaa, J. S. Baron, A. J. Boston, J. A. Clark, J. P. Greene, J. Heery, C. R. Hoffman, T. Lauritsen, J. Li, D. Little, E. S. Paul, G. Savard, D. Seweryniak, J. Simpson, S. Stolze, G. L. Wilson, J. Wu, S. Zhu
Summary: Maximal ground-state deformation is expected when both proton and neutron Fermi surfaces are located at midshell, but stable large deformations can also occur at other proton or neutron values. Evidence of this has been observed in the rare-earth region, specifically at Z = 60. Further evidence of the deformed gap has been found by studying the signature splitting systematics of nu i13/2 bands in odd-N, rare-earth nuclei, and confirmed through particle transfer experiments.
