Gamma above the neutron threshold experiments at ELI-NP

Camera, F.; Utsunomiya, H.; Varlamov, V.; Filipescu, D.; Baran, V.; Bracco, A.; Golo, G.; Gheorghe, I.; Glodariu, T.; Matei, C.; Wieland, O.

Авторы: Camera F., Utsunomiya H., Varlamov V., Filipescu D., Baran V., Bracco A., Golo G., Gheorghe I., Glodariu T., Matei C., Wieland O.
Журнал: Romanian Journal in Physics
Том: 68
Номер: 2
Год издания: 2016
Издательство: Editura Academiei Romane/Publishing House of the Romanian Academy
Местоположение издательства: Romania
Первая страница: S539
Последняя страница: S619
Аннотация: This Technical Design Report describes the physics cases and instrumentation proposed by the ELI-NP Working Group "Gamma Above Neutron Threshold" (hereafter ELIGANT). Extremely high-intensity and monochromatic gamma-ray beams available at the ELI-NP allow us to enter a precision era of investigating electromagnetic responses of atomic nuclei. The ELIGANT group addresses the following 4 physics cases related to: p-process nucleosynthesis, Nuclear structure of Giant Dipole Resonance (GDR), New Compilation of total and partial photoneutron cross sections, Nuclear structure of Pygmy Dipole Resonance (PDR) and spin-flip Magnetic Dipole Resonance (MDR). For the p-process nucleosynthesis we measure photoneutron cross sections for rare isotopes (the p-process nuclei) near neutron threshold (S-n). For nuclear structure of GDR by neutron decay, we measure (gamma,xn) cross sections with x = 1-2 for a new compilation of total and partial photoneutron cross sections to be pursued as a Coordinated Research Project (CRP) of the International Atomic Energy Agency (IAEA) and to measure exclusive neutron decays of GDR to the ground state and excited states in residual nuclei. For nuclear structure of GDR and PDR by gamma decay, we measure direct gamma decays of GDR to the ground state with branching ratios of the order of 1%. For nuclear structure of PDR and spin-flip MDR, we detect PDR and MDR in nuclei around neutron magic numbers with special emphasis on odd-N nuclei above S-n which is as low as 6 MeV. This will produce, together with data from nuclear resonance fluorescence (NRF) measurements, a complete study of the PDR and MDR. The TDRs of both "NRF" and "Gamma Above Neutron Threshold" will focus on PDR-MDR studies but in different energy range, nuclei and with different instrumentation. Both TDR will benefit from the synergic use of each other instrumentations.
Добавил в систему: Варламов Владимир Васильевич

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