Direct evidence of fadeout of collective enhancement in nuclear level density
The phenomenon of collective enhancement in nuclear level density and its fadeout has been probed using neutron evaporation study of two strongly deformed (173Lu, 185Re), and one spherical (201Tl) compound nuclei over the excitation energy (E⁎) range of ∼22–56 MeV. Clear signature of the fadeout of...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-09-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317305099 |
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| author | K. Banerjee Pratap Roy Deepak Pandit Jhilam Sadhukhan S. Bhattacharya C. Bhattacharya G. Mukherjee T.K. Ghosh S. Kundu A. Sen T.K. Rana S. Manna R. Pandey T. Roy A. Dhal Md.A. Asgar S. Mukhopadhyay |
| author_facet | K. Banerjee Pratap Roy Deepak Pandit Jhilam Sadhukhan S. Bhattacharya C. Bhattacharya G. Mukherjee T.K. Ghosh S. Kundu A. Sen T.K. Rana S. Manna R. Pandey T. Roy A. Dhal Md.A. Asgar S. Mukhopadhyay |
| author_sort | K. Banerjee |
| collection | DOAJ |
| description | The phenomenon of collective enhancement in nuclear level density and its fadeout has been probed using neutron evaporation study of two strongly deformed (173Lu, 185Re), and one spherical (201Tl) compound nuclei over the excitation energy (E⁎) range of ∼22–56 MeV. Clear signature of the fadeout of collective enhancement in nuclear level density was observed for the first time in both the deformed evaporation residues 172Lu and 184Re at an excitation energy range ∼14–21 MeV. Calculations based on finite temperature density functional theory, as well as macroscopic–microscopic shape transition model, have strongly established a close correlation between the observed fadeout of collective enhancement and a deformed to spherical nuclear shape transition in these nuclei occurring in the same excitation energy zone. Interestingly, a weak signature of fadeout has also been observed for the spherical residue 200Tl. This is due to a similar shape transition of the deformed excited state configuration of 200Tl. |
| first_indexed | 2024-12-13T17:57:29Z |
| format | Article |
| id | doaj.art-8494478e5d4b4d5facbd0c7a26100e26 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-13T17:57:29Z |
| publishDate | 2017-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-8494478e5d4b4d5facbd0c7a26100e262022-12-21T23:36:20ZengElsevierPhysics Letters B0370-26931873-24452017-09-01772C10510910.1016/j.physletb.2017.06.033Direct evidence of fadeout of collective enhancement in nuclear level densityK. Banerjee0Pratap Roy1Deepak Pandit2Jhilam Sadhukhan3S. Bhattacharya4C. Bhattacharya5G. Mukherjee6T.K. Ghosh7S. Kundu8A. Sen9T.K. Rana10S. Manna11R. Pandey12T. Roy13A. Dhal14Md.A. Asgar15S. Mukhopadhyay16Variable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaVariable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata 700064, IndiaThe phenomenon of collective enhancement in nuclear level density and its fadeout has been probed using neutron evaporation study of two strongly deformed (173Lu, 185Re), and one spherical (201Tl) compound nuclei over the excitation energy (E⁎) range of ∼22–56 MeV. Clear signature of the fadeout of collective enhancement in nuclear level density was observed for the first time in both the deformed evaporation residues 172Lu and 184Re at an excitation energy range ∼14–21 MeV. Calculations based on finite temperature density functional theory, as well as macroscopic–microscopic shape transition model, have strongly established a close correlation between the observed fadeout of collective enhancement and a deformed to spherical nuclear shape transition in these nuclei occurring in the same excitation energy zone. Interestingly, a weak signature of fadeout has also been observed for the spherical residue 200Tl. This is due to a similar shape transition of the deformed excited state configuration of 200Tl.http://www.sciencedirect.com/science/article/pii/S0370269317305099Nuclear level densityStatistical compound-nucleus reactionsNeutron spectroscopyLiquid scintillator based neutron detectors |
| spellingShingle | K. Banerjee Pratap Roy Deepak Pandit Jhilam Sadhukhan S. Bhattacharya C. Bhattacharya G. Mukherjee T.K. Ghosh S. Kundu A. Sen T.K. Rana S. Manna R. Pandey T. Roy A. Dhal Md.A. Asgar S. Mukhopadhyay Direct evidence of fadeout of collective enhancement in nuclear level density Physics Letters B Nuclear level density Statistical compound-nucleus reactions Neutron spectroscopy Liquid scintillator based neutron detectors |
| title | Direct evidence of fadeout of collective enhancement in nuclear level density |
| title_full | Direct evidence of fadeout of collective enhancement in nuclear level density |
| title_fullStr | Direct evidence of fadeout of collective enhancement in nuclear level density |
| title_full_unstemmed | Direct evidence of fadeout of collective enhancement in nuclear level density |
| title_short | Direct evidence of fadeout of collective enhancement in nuclear level density |
| title_sort | direct evidence of fadeout of collective enhancement in nuclear level density |
| topic | Nuclear level density Statistical compound-nucleus reactions Neutron spectroscopy Liquid scintillator based neutron detectors |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317305099 |
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