Statistical neutron capture in the limit of low nuclear level density

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10404996" target="_blank" >RIV/00216208:11320/19:10404996 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=osq88JTnGj" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=osq88JTnGj</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.99.024318" target="_blank" >10.1103/PhysRevC.99.024318</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Statistical neutron capture in the limit of low nuclear level density

Popis výsledku v původním jazyce

A major barrier in the study of neutron-induced nuclear reactions is the impossibility of direct measurements with short-lived radioactive isotopes. For these exotic nuclei, theoretical inputs such as the photon strength function (PSF) are poorly constrained. At Los At Los National Laboratory, the Detector for Advanced Neutron Capture Experiments (DANCE) provides direct measurements of gamma-ray cascades following neutron capture reactions on stable or long-lived radioactive nuclei. While Hauser-Feshbach calculations can provide reasonable predictions for neutron capture on heavy nuclei, their application to neutron-rich light nuclei with low nuclear level densities and low neutron separation energies is questionable. In this paper, we report on the gamma-ray spectra from individual neutron resonances from the Zr-96(n, gamma) reaction, with an emphasis on the sensitivity of of the gamma-ray spectra to different PSF models. The comparison of the measured gamma-ray spectra with predicted spectra does not support the addition of a low-energy enhancement of the size reported in many charged-particle reaction measurements, but the sensitivity of the gamma-ray spectra to different PSF models is weak.

Název v anglickém jazyce

Statistical neutron capture in the limit of low nuclear level density

Popis výsledku anglicky

A major barrier in the study of neutron-induced nuclear reactions is the impossibility of direct measurements with short-lived radioactive isotopes. For these exotic nuclei, theoretical inputs such as the photon strength function (PSF) are poorly constrained. At Los At Los National Laboratory, the Detector for Advanced Neutron Capture Experiments (DANCE) provides direct measurements of gamma-ray cascades following neutron capture reactions on stable or long-lived radioactive nuclei. While Hauser-Feshbach calculations can provide reasonable predictions for neutron capture on heavy nuclei, their application to neutron-rich light nuclei with low nuclear level densities and low neutron separation energies is questionable. In this paper, we report on the gamma-ray spectra from individual neutron resonances from the Zr-96(n, gamma) reaction, with an emphasis on the sensitivity of of the gamma-ray spectra to different PSF models. The comparison of the measured gamma-ray spectra with predicted spectra does not support the addition of a low-energy enhancement of the size reported in many charged-particle reaction measurements, but the sensitivity of the gamma-ray spectra to different PSF models is weak.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

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

99

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

024318

Kód UT WoS článku

000459904000002

EID výsledku v databázi Scopus

2-s2.0-85062442749