Examination of photon strength functions and nuclear level density in Pt 196 from the γ-ray spectra measured at the DANCE facility

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421788" target="_blank" >RIV/00216208:11320/20:10421788 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4yNE-5yDBF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4yNE-5yDBF</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.101.024302" target="_blank" >10.1103/PhysRevC.101.024302</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Examination of photon strength functions and nuclear level density in Pt 196 from the γ-ray spectra measured at the DANCE facility

Popis výsledku v původním jazyce

Background: The nuclear level density (NLD) and photon strength functions (PSFs) are necessary quantities for calculating the interaction of photons with nuclei, in particular the reaction cross sections. As such, they are important especially in nuclear astrophysics and in the development of advanced nuclear technologies.Purpose: The presence of a resonancelike structure in the E1 PSF at γ-ray energy of about 5.5 MeV was reported in γ-soft AALMOST EQUAL TO200 nuclei from several experimental techniques. However, as data from different experiments are not fully consistent, additional information on PSFs in this region is of great interest. In addition, present PSF models have difficulties to describe resonancelike structures for energies below the neutron separation energy Sn. There are also open questions about the energy and parity dependence of the NLD. Methods: The γ rays following the radiative neutron capture on Pt195s-wave resonances were measured with the highly segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments at the Los Alamos Neutron Science Center. The γ-ray energy spectra for different multiplicities were gathered for several resonances of both possible spins. Results: The γ-ray energy spectra were analyzed within the statistical model and allowed us to get information about the NLD and PSFs in Pt196. Neither the PSFs from any previous experiment nor any available PSFs models are able to describe our spectra. We were able to find PSFs and NLD that reasonably describe experimental spectra and impose various restrictions on these quantities. Conclusions: The presence of a resonancelike structure in the E1 PSF at a γ-ray energy of about 5.6 MeV is confirmed. The constant temperature energy dependence is favored for a NLD with a significant parity dependence up to an excitation energy of at least 4 MeV. The preferred M1 PSF shape is close to a Lorentzian tail of the spin-flip resonance.

Název v anglickém jazyce

Examination of photon strength functions and nuclear level density in Pt 196 from the γ-ray spectra measured at the DANCE facility

Popis výsledku anglicky

Background: The nuclear level density (NLD) and photon strength functions (PSFs) are necessary quantities for calculating the interaction of photons with nuclei, in particular the reaction cross sections. As such, they are important especially in nuclear astrophysics and in the development of advanced nuclear technologies.Purpose: The presence of a resonancelike structure in the E1 PSF at γ-ray energy of about 5.5 MeV was reported in γ-soft AALMOST EQUAL TO200 nuclei from several experimental techniques. However, as data from different experiments are not fully consistent, additional information on PSFs in this region is of great interest. In addition, present PSF models have difficulties to describe resonancelike structures for energies below the neutron separation energy Sn. There are also open questions about the energy and parity dependence of the NLD. Methods: The γ rays following the radiative neutron capture on Pt195s-wave resonances were measured with the highly segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments at the Los Alamos Neutron Science Center. The γ-ray energy spectra for different multiplicities were gathered for several resonances of both possible spins. Results: The γ-ray energy spectra were analyzed within the statistical model and allowed us to get information about the NLD and PSFs in Pt196. Neither the PSFs from any previous experiment nor any available PSFs models are able to describe our spectra. We were able to find PSFs and NLD that reasonably describe experimental spectra and impose various restrictions on these quantities. Conclusions: The presence of a resonancelike structure in the E1 PSF at a γ-ray energy of about 5.6 MeV is confirmed. The constant temperature energy dependence is favored for a NLD with a significant parity dependence up to an excitation energy of at least 4 MeV. The preferred M1 PSF shape is close to a Lorentzian tail of the spin-flip resonance.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/GA19-14048S" target="_blank" >GA19-14048S: Zkoumání nových vlastností jaderných elektromagnetických excitací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

—

Svazek periodika

101

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

024302

Kód UT WoS článku

000674492100001

EID výsledku v databázi Scopus

2-s2.0-85079816219