Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section
Evaporated α-spectra have been measured in coincidence with low energy discrete γ-rays from residual nucleus 68Zn populated by αn evaporation from compound nucleus 73Ge produced in the reaction 64Ni(9Be,αn)68Zn at E(9Be) = 30 MeV. Low energy γ-gated α-particle spectra, for the first time, have been...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-07-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320302914 |
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| author | Rajkumar Santra Balaram Dey Subinit Roy Md.S.R. Laskar R. Palit H. Pai S. Rajbanshi Sajad Ali Saikat Bhattacharjee F.S. Babra Anjali Mukherjee S. Jadhav Balaji S. Naidu Abraham T. Vazhappilly Sanjoy Pal |
| author_facet | Rajkumar Santra Balaram Dey Subinit Roy Md.S.R. Laskar R. Palit H. Pai S. Rajbanshi Sajad Ali Saikat Bhattacharjee F.S. Babra Anjali Mukherjee S. Jadhav Balaji S. Naidu Abraham T. Vazhappilly Sanjoy Pal |
| author_sort | Rajkumar Santra |
| collection | DOAJ |
| description | Evaporated α-spectra have been measured in coincidence with low energy discrete γ-rays from residual nucleus 68Zn populated by αn evaporation from compound nucleus 73Ge produced in the reaction 64Ni(9Be,αn)68Zn at E(9Be) = 30 MeV. Low energy γ-gated α-particle spectra, for the first time, have been used to extract the nuclear level density (NLD) for the intermediate 69Zn nucleus in the excitation energy range of E ≈ 4-20 MeV. The slope of present NLD data as a function of excitation energy for 69Zn matches nicely with the slope determined from RIPL estimates for NLD at low energies and the NLD from neutron resonance data at neutron separation energy Sn. The extracted inverse NLD parameter (k = A/a˜) has been used to determine the nuclear level density parameter value a at neutron separation energy Sn for 69Zn. The cross section of 68Zn(n,γ) capture reaction as a function of neutron energy is then estimated employing the derived a(Sn) in the reaction code TALYS. It is found that the estimated neutron capture cross section agrees well with the available experimental data without any normalization. The present result indicates that experimentally derived nuclear level density parameter can constrain the statistical model description of astrophysical capture cross section and optimize the uncertainties associated with astrophysical reaction rate. |
| first_indexed | 2024-12-20T03:01:21Z |
| format | Article |
| id | doaj.art-48f8c39ae9ac44018e5b6ecdf76307dd |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-20T03:01:21Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-48f8c39ae9ac44018e5b6ecdf76307dd2022-12-21T19:55:45ZengElsevierPhysics Letters B0370-26932020-07-01806135487Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross sectionRajkumar Santra0Balaram Dey1Subinit Roy2Md.S.R. Laskar3R. Palit4H. Pai5S. Rajbanshi6Sajad Ali7Saikat Bhattacharjee8F.S. Babra9Anjali Mukherjee10S. Jadhav11Balaji S. Naidu12Abraham T. Vazhappilly13Sanjoy Pal14Nuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, India; Homi Bhabha National Institute, Mumbai-400094, IndiaDepartment of Physics, Bankura University, Bankura-722155, IndiaNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, India; Corresponding author.Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, IndiaDepartment of Physics, Presidency University, Kolkata-700073, IndiaNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, India; Homi Bhabha National Institute, Mumbai-400094, IndiaNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, India; Homi Bhabha National Institute, Mumbai-400094, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaNuclear Physics Division, Saha Institute of Nuclear Physics, Kolkata-700064, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaDepartment of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai-400005, IndiaEvaporated α-spectra have been measured in coincidence with low energy discrete γ-rays from residual nucleus 68Zn populated by αn evaporation from compound nucleus 73Ge produced in the reaction 64Ni(9Be,αn)68Zn at E(9Be) = 30 MeV. Low energy γ-gated α-particle spectra, for the first time, have been used to extract the nuclear level density (NLD) for the intermediate 69Zn nucleus in the excitation energy range of E ≈ 4-20 MeV. The slope of present NLD data as a function of excitation energy for 69Zn matches nicely with the slope determined from RIPL estimates for NLD at low energies and the NLD from neutron resonance data at neutron separation energy Sn. The extracted inverse NLD parameter (k = A/a˜) has been used to determine the nuclear level density parameter value a at neutron separation energy Sn for 69Zn. The cross section of 68Zn(n,γ) capture reaction as a function of neutron energy is then estimated employing the derived a(Sn) in the reaction code TALYS. It is found that the estimated neutron capture cross section agrees well with the available experimental data without any normalization. The present result indicates that experimentally derived nuclear level density parameter can constrain the statistical model description of astrophysical capture cross section and optimize the uncertainties associated with astrophysical reaction rate.http://www.sciencedirect.com/science/article/pii/S0370269320302914Compound nuclear reactionEvaporation particle spectraNuclear level densityNeutron capture cross section |
| spellingShingle | Rajkumar Santra Balaram Dey Subinit Roy Md.S.R. Laskar R. Palit H. Pai S. Rajbanshi Sajad Ali Saikat Bhattacharjee F.S. Babra Anjali Mukherjee S. Jadhav Balaji S. Naidu Abraham T. Vazhappilly Sanjoy Pal Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section Physics Letters B Compound nuclear reaction Evaporation particle spectra Nuclear level density Neutron capture cross section |
| title | Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section |
| title_full | Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section |
| title_fullStr | Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section |
| title_full_unstemmed | Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section |
| title_short | Nuclear level density of 69Zn from gamma gated particle spectrum and its implication on 68Zn(n, γ)69Zn capture cross section |
| title_sort | nuclear level density of 69zn from gamma gated particle spectrum and its implication on 68zn n γ 69zn capture cross section |
| topic | Compound nuclear reaction Evaporation particle spectra Nuclear level density Neutron capture cross section |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320302914 |
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