Evaluation of partial and total photoneutron reactions cross sections using new objective physical data reliability criteria

Varlamov, V.V.

Автор: Varlamov V.V.
Сборник: 3rd Research coordination meeting “Updating photonuclear data library and generating a reference database for photon strength functions
Серия: INDC(NDS)-0777
Год издания: 2019
Место издания: IAEA NDS Vienna, Austria
Первая страница: 10
Последняя страница: 12
Аннотация: In accordance with Scientific Scope of the Project the detailed working plan for the third year is the following: 1) The energy dependencies of multiplicity transitional functions Fi-exp and Fi-theor, the evaluated cross sections for partial reactions, and correspondent integrated cross sections will be obtained for energies by experimental–theoretical method for 75As, 78,82Se, 140,142Ce, 145,148Nd, 160Gd. 2) For selected nuclei (116Sn, 139La, 197Au,) neutron emission spectra will be calculated in the frame of the CMPNR. 3) For all investigated nuclei ted evaluated cross sections will be compared with the results of modern photonuclear measurements carried out using various methods. 4) For nuclei investigated on the whole evaluated data will be prepared as ENDF files. 5) Recommendations for updating the IAEA Photonuclear Data Library will be formulated. Additionally to the list of nuclei mentioned above 165Ho was moved firstly from the CRP 1st year program of work to the 2nd and later to the 3rd one and 103Rh was moved from the 2nd to the 3rd year program of work. The results obtained In accordance with Scientific Scopes of the Contract 20501 all 3 year working plans the experimental data for partial photoneutron reaction cross sections were analyzed using objective physical data reliability criteria [1–3] – neutron multiplicity transitional functions Fi-exp – for all nuclei included into the lists of 3 working plans – 63,65Cu ([4], EXFOR – M0920), 75As [5], 78,82Se ([6], M0973), 80Se ([4], M0920), 89Y ([7,8], M0931), 103Rh [9], 133Cs ([3], M0922), 139La ([10], M0970) 140,142Ce ([11], M0972), 138Ba ([3], M0922), 141Pr ([12], M0938), 145,148Nd ([13], M0971), 160Gd[14], 165Ho ([9], M0974), 186W ([12], M0938), 197Au ([1], M0798), 209Bi ([3], M0922). Additionally to the Contract program the analogous analysis of partial photoneutron reaction cross-section data reliability was carried out and new evaluated reliable data were obtained for 59Co [15], 76Se [6], 90,92Zr [16], 98Mo [17], 116Sn [18], 153Eu [19]. Those nuclei were chosen because many doubts in experimental data reliability, predominantly because the presence of many negative values in the (g, 1n) reaction cross sections. The new evaluated cross sections for partial reactions (g, 1n), (g, 2n) and (g, 3n) and also for total photoneutron reaction (g, tot) = (g, 1n) + (g, 2n) + (g, 3n) for all nuclei mentioned were obtained using experimentally–theoretical method [1–3] for all nuclei mentioned [4–24]. Almost all of obtained data were published and included into the international database EXFOR. Data for 75As, 76,78,80,82Se, 103Rh, and 160Gd were submitted to various journals. For 209Bi newly evaluated data additionally to the previously evaluated once were obtained using new data for reaction SIGMA(g, Sn) measured in the NewSUBARU facility (Japan) using quasi-monochromatic laser Compton–scattering (LCS) γ–ray beams and the novel technique of direct neutron-multiplicity sorting with a flat–efficiency detector [20]. In accordance with Scientific Scope of the Contract 3 year working plans neutron emission spectra were calculated in the frame of the CMPNR for selected nuclei 116Sn [21], 141Pr [22], 181Ta [23], 186W [22], 197Au [24], 208Pb [23], 209Bi [23]. References [1] V.V. Varlamov, B.S. Ishkhanov, V.N. Orlin, S.Yu. Troshchiev, Bull. Rus. Acad. Sci. 74 (2010) 842. [2] V.V. Varlamov, B.S. Ishkhanov, V.N. Orlin, N.N. Peskov, M.E. Stepanov, Phys. Atom. Nucl. 76 (2013) 1403. [3] V.V. Varlamov, B.S. Ishkhanov, V.N. Orlin, N.N. Peskov, M.E. Stepanov, Phys. Atom. Nucl. 79 (2016) 501. [4] V.V. Varlamov, A.I. Davydov, M.A. Makarov, V.N. Orlin, N.N. Peskov, Bull. Rus. Acad. Sci. Phys. 80 (2016) 317. [5] V.V. Varlamov, A. Davydov, V. Kaidarova, V. Orlin, Submitted to Phys. Rev. C. [6] V.V. Varlamov, A.I. Davydov, B.S. Ishkhanov, Submitted to Phys. Atom. Nucl. [7] V.V. Varlamov, B.S. Ishkhanov, V.N. Orlin, N.N. Peskov, M.E. Stepanov, EPJ Web of Conferences 146 (2017) 05005. [8] V.V. Varlamov, A.I. Davydov, V.N. Orlin, N.N. Peskov, Bull. Rus. Acad. Sci. Phys. 81 (2017) 664. [9] V.V. Varlamov, A.I. Davydov, V.D. Kaidarova, Submitted to Phys. Atom. Nucl. [10] V.V. Varlamov, V.D. Kaidarova, Bull. Rus. Acad. Sci. Phys. 82 (2018) 614. [11] V.V.Varlamov, V.A. Barbaryan, N.N. Peskov, Abstracts of the International Conference «Nucleus-2017» (67th Meeting on Nuclear Spectroscopy and Atomic Nucleus Structure), September 12-15, 2017, Kazakhstan, Almaty, RSE INP, 2017, ISBN 978–601–06–4394–9, p. 26. [12] V.V. Varlamov, V.N. Orlin, N.N. Peskov, Bull. Rus. Acad. Sci. Phys. 81 (2017) 670. [13] V.V. Varlamov, V.D. Kaidarova, Memoirs of the Faculty of Physics of the Lomonosov Moscow State University, N4, 2018, 1840201. [14] V.V. Varlamov, V.D. Kaidarova, V.N. Orlin. Submitted to the Memoirs of the Faculty of Physics of the Lomonosov Moscow State University. [15] V.V. Varlamov, A.I. Davydov, B.S. Ishkhanov, Eur. Phys. J. A 53 (2017) 180. [16] V.V. Varlamov, A.I. Davydov, B.S. Ishkhanov, V.N. Orlin. Eur. Phys. J. A 54 (2018) 74. [17] V.V. Varlamov, V.D. Kaidarova, M.E. Stepanov, Moscow University Physics Bulletin 73 (2018) 68. [18] V.V. Varlamov, B.S. Ishkhanov, A.A. Kuznetsov, V.N. Orlin, A.A. Proshyakov. Memoirs of the Faculty of Physics, Lomonosov Moscow State University, No 3, 2017, 173202. [19] V.V. Varlamov, A.I. Davydov, LXVIII International Conference «Nucleus-2018». Fundamental Problems of Nuclear Physics, Atomic Power Engineering and Nuclear Technologies (LXVIII Meeting on Nuclear Spectroscopy and Nuclear Structure), July 2–6, 2018, Voronezh, Russia. Book of Abstracts. Saint Petersburg, Publishing VVM, 2018, p. 97. [20] I. Gheorgine, D. Filipescu, S. Katayama, H. Utsunomiya, S.S. Belyshev, V.V. Varlamov, T. Shima, S. Amano, S. Miyamoto, EPJ Web of Conferences 146 (2017) 05011. [21] V.V. Varlamov, B.S. Ishkhanov, V.N. Orlin, Phys. Atom. Nucl. 80 (2017) 1106. [22] V.V.Varlamov, V.N.Orlin N.N.Peskov, Bull. Rus. Acad. Sci. Phys. 81 (2017) 670. [23] V.V. Varlamov, V.N. Orlin, N.N. Peskov, Abstracts of the International Conference «Nucleus-2017» (67th Meeting on Nuclear Spectroscopy and Atomic Nucleus Structure), September 12–15, 2017, Kazakhstan, Almaty, RSE INP, 2017, ISBN 978–601–06–4394–9, p. 31. [24] V.V. Varlamov, B. Ishkhanov, V. Orlin, Phys. Rev. C 96 (2017) 044606.
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