Determination of fission barrier height of 210Fr and 210Ra via neutron measurement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F24%3A00372945" target="_blank" >RIV/68407700:21670/24:00372945 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.109.014618" target="_blank" >https://doi.org/10.1103/PhysRevC.109.014618</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.109.014618" target="_blank" >10.1103/PhysRevC.109.014618</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of fission barrier height of 210Fr and 210Ra via neutron measurement

Popis výsledku v původním jazyce

Fission barrier heights of short-lived nuclei away from line of β stability are not known reliably. Low-energy fission of 210Fr and 210Ra, produced by (d,p) and (d,n) transfer reaction on the re-accelerated unstable beam 209Fr was investigated at HIE-ISOLDE. Four Timepix3 pixel detectors were installed on the body of the ACTAR TPC demonstrator chamber. Polyethylene converters were used for the detection of fast neutrons. Since no significant background was observed, it was possible to measure the spatial distribution of emitted neutrons reflecting the fission excitation function. Subsequent simulations employing the results of the talys code and available data on fission fragment distributions allowed to estimate directly the value of the fission barrier height for the neutron-deficient nucleus 210Fr. This first direct measurement confirmed the reduction of the fission barrier compared to available theoretical calculations by 15–30%.

Název v anglickém jazyce

Determination of fission barrier height of 210Fr and 210Ra via neutron measurement

Popis výsledku anglicky

Fission barrier heights of short-lived nuclei away from line of β stability are not known reliably. Low-energy fission of 210Fr and 210Ra, produced by (d,p) and (d,n) transfer reaction on the re-accelerated unstable beam 209Fr was investigated at HIE-ISOLDE. Four Timepix3 pixel detectors were installed on the body of the ACTAR TPC demonstrator chamber. Polyethylene converters were used for the detection of fast neutrons. Since no significant background was observed, it was possible to measure the spatial distribution of emitted neutrons reflecting the fission excitation function. Subsequent simulations employing the results of the talys code and available data on fission fragment distributions allowed to estimate directly the value of the fission barrier height for the neutron-deficient nucleus 210Fr. This first direct measurement confirmed the reduction of the fission barrier compared to available theoretical calculations by 15–30%.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/GA21-24281S" target="_blank" >GA21-24281S: Experiment IS581 "Štěpení těžkých radiaktivních svazků v reakcích (d,p)-transferu"</a><br>

Návaznosti

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

Rok uplatnění

2024

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

2469-9993

Svazek periodika

109

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

001176020400002

EID výsledku v databázi Scopus

2-s2.0-85183021339