Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital
A Magnetic Rotational (MR) band in 57Fe nucleus has been newly identified and established from the decreasing behaviour of the experimental electric dipole transition probabilities, B(M1), determined from the measured lifetimes of the states. This becomes the first nucleus in the lighter mass (A<...
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Elsevier
2025-09-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325004034 |
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| author | S. Basu G. Mukherjee S. Rajbanshi Y. Utsuno Noritaka Shimizu S. Nandi S.S. Nayak S. Pal S. Bhattacharyya S. Chakraborty Soumik Bhattacharya Shabir Dar Sneha Das S. Basak D. Kumar D. Paul K. Banerjee Pratap Roy S. Manna Samir Kundu T.K. Rana R. Pandey S. Samanta S. Chatterjee R. Raut S.S. Ghugre H. Pai A. Karmakar S. Chattopadhyay S. Das Gupta P. Pallav R. Banik S. Ali Y.M. Wang Q.B. Chen |
| author_facet | S. Basu G. Mukherjee S. Rajbanshi Y. Utsuno Noritaka Shimizu S. Nandi S.S. Nayak S. Pal S. Bhattacharyya S. Chakraborty Soumik Bhattacharya Shabir Dar Sneha Das S. Basak D. Kumar D. Paul K. Banerjee Pratap Roy S. Manna Samir Kundu T.K. Rana R. Pandey S. Samanta S. Chatterjee R. Raut S.S. Ghugre H. Pai A. Karmakar S. Chattopadhyay S. Das Gupta P. Pallav R. Banik S. Ali Y.M. Wang Q.B. Chen |
| author_sort | S. Basu |
| collection | DOAJ |
| description | A Magnetic Rotational (MR) band in 57Fe nucleus has been newly identified and established from the decreasing behaviour of the experimental electric dipole transition probabilities, B(M1), determined from the measured lifetimes of the states. This becomes the first nucleus in the lighter mass (A<60) region in which, the B(M1) values of an MR band are measured. A single-particle configuration of πf7/2−2⊗ν(p3/2f5/2p1/2)3 has been assigned to this MR band. This configuration, which involves only the negative parity proton and neutron orbitals below and above the Z,N = 28 shell closures, respectively, is a unique one which was not identified before for an MR band. The range of observed angular momenta for this band is congruent with this configuration and the experimental data are found to be in agreement with the SPAC (Shears mechanism with Principal Axis Cranking) and semi-classical calculations. Shell model calculations with GXPF1A interaction reproduce the observed levels in 57Fe including the band head of the MR band. This validates the assigned configurations of this band. |
| format | Article |
| id | doaj-art-77482244f89d4e5883e48fb12f2e6794 |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-77482244f89d4e5883e48fb12f2e67942025-08-20T03:46:46ZengElsevierPhysics Letters B0370-26932025-09-0186813964210.1016/j.physletb.2025.139642Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbitalS. Basu0G. Mukherjee1S. Rajbanshi2Y. Utsuno3Noritaka Shimizu4S. Nandi5S.S. Nayak6S. Pal7S. Bhattacharyya8S. Chakraborty9Soumik Bhattacharya10Shabir Dar11Sneha Das12S. Basak13D. Kumar14D. Paul15K. Banerjee16Pratap Roy17S. Manna18Samir Kundu19T.K. Rana20R. Pandey21S. Samanta22S. Chatterjee23R. Raut24S.S. Ghugre25H. Pai26A. Karmakar27S. Chattopadhyay28S. Das Gupta29P. Pallav30R. Banik31S. Ali32Y.M. Wang33Q.B. Chen34Variable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India; Corresponding author.Department of Physics, Presidency University, Kolkata-700073, IndiaAdvanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan; Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, JapanCenter for Computational Sciences, University of Tsukuba, Tsukuba, 305-8577, JapanVariable Energy Cyclotron Centre, Kolkata 700064, India; Subatech (IMT Atlantique, CNRS/IN2P3, Nantes Université), 4 rue Alfred Kastler, 44307 Nantes cedex 3, FranceVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Institute of Engineering & Management, Kolkata-700091, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaVariable Energy Cyclotron Centre, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaUGC-DAE CSR, Kolkata Centre, LB-8, LB Block, Sector III, Bidhannagar, Kolkata 700098, India; Department of Physics, School of Basic and Applied Sciences, Adamas University, Kolkata 700126, IndiaUGC-DAE CSR, Kolkata Centre, LB-8, LB Block, Sector III, Bidhannagar, Kolkata 700098, IndiaUGC-DAE CSR, Kolkata Centre, LB-8, LB Block, Sector III, Bidhannagar, Kolkata 700098, IndiaUGC-DAE CSR, Kolkata Centre, LB-8, LB Block, Sector III, Bidhannagar, Kolkata 700098, IndiaExtreme Light Infrastructure - Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Bucharest-Magurele, 077125, RomaniaSaha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India; Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, IndiaSaha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, IndiaVictoria Institution (College), Kolkata-700009, IndiaVictoria Institution (College), Kolkata-700009, India; Department of Physics, School of Basic and Applied Sciences, Adamas University, Kolkata 700126, IndiaInstitute of Engineering & Management, Kolkata-700091, IndiaGovernment General Degree College at Pedong, Kalimpong, West Bengal 734311, IndiaDepartment of Physics, East China Normal University, Shanghai 200241, ChinaDepartment of Physics, East China Normal University, Shanghai 200241, ChinaA Magnetic Rotational (MR) band in 57Fe nucleus has been newly identified and established from the decreasing behaviour of the experimental electric dipole transition probabilities, B(M1), determined from the measured lifetimes of the states. This becomes the first nucleus in the lighter mass (A<60) region in which, the B(M1) values of an MR band are measured. A single-particle configuration of πf7/2−2⊗ν(p3/2f5/2p1/2)3 has been assigned to this MR band. This configuration, which involves only the negative parity proton and neutron orbitals below and above the Z,N = 28 shell closures, respectively, is a unique one which was not identified before for an MR band. The range of observed angular momenta for this band is congruent with this configuration and the experimental data are found to be in agreement with the SPAC (Shears mechanism with Principal Axis Cranking) and semi-classical calculations. Shell model calculations with GXPF1A interaction reproduce the observed levels in 57Fe including the band head of the MR band. This validates the assigned configurations of this band.http://www.sciencedirect.com/science/article/pii/S0370269325004034 |
| spellingShingle | S. Basu G. Mukherjee S. Rajbanshi Y. Utsuno Noritaka Shimizu S. Nandi S.S. Nayak S. Pal S. Bhattacharyya S. Chakraborty Soumik Bhattacharya Shabir Dar Sneha Das S. Basak D. Kumar D. Paul K. Banerjee Pratap Roy S. Manna Samir Kundu T.K. Rana R. Pandey S. Samanta S. Chatterjee R. Raut S.S. Ghugre H. Pai A. Karmakar S. Chattopadhyay S. Das Gupta P. Pallav R. Banik S. Ali Y.M. Wang Q.B. Chen Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital Physics Letters B |
| title | Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital |
| title_full | Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital |
| title_fullStr | Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital |
| title_full_unstemmed | Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital |
| title_short | Conclusive evidence of magnetic rotational band in 57Fe: Extending the shears mechanism to the fp shell orbital |
| title_sort | conclusive evidence of magnetic rotational band in 57fe extending the shears mechanism to the fp shell orbital |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325004034 |
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