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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10300 - Physical sciences

Project

<a href="/en/project/GA19-14048S" target="_blank" >GA19-14048S: Theoretical and experimental search for new features of electromagnetic nuclear excitations</a><br>

Continuities

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

Publication year

2020

Confidentiality

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

Name of the periodical

Physical Review C

ISSN

2469-9985

e-ISSN

—

Volume of the periodical

101

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

024302

UT code for WoS article

000674492100001

EID of the result in the Scopus database

2-s2.0-85079816219