H-6 states studied in the H-2(He-8, He-4) reaction and evidence of an extremely correlated character of the( 5)H ground state

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F22%3AA0000197" target="_blank" >RIV/47813059:19630/22:A0000197 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prc/abstract/10.1103/PhysRevC.105.064605" target="_blank" >https://journals.aps.org/prc/abstract/10.1103/PhysRevC.105.064605</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.105.064605" target="_blank" >10.1103/PhysRevC.105.064605</a>

Jazyk výsledku

angličtina

Název v původním jazyce

H-6 states studied in the H-2(He-8, He-4) reaction and evidence of an extremely correlated character of the( 5)H ground state

Popis výsledku v původním jazyce

The extremely neutron-rich system 6H was studied in the direct 2H(8He, 4He) 6H transfer reaction with a 26A MeV secondary 8He beam. The measured missing mass spectrum shows a broad bump at ???4???8 MeV above the 3H +3n decay threshold. This bump can be interpreted as a broad resonant state in 6H at 6.8(5) MeV. The population cross section of such a presumably p-wave state (or it may be few overlapping states) in the energy range from 4 to 8 MeV is d??/d???c.m. ??? 190+40???80 ??b/sr in the angular range 5??? &lt; ??c.m. &lt; 16???. The obtained missing mass spectrum is practically free of 6H events below 3.5 MeV (d??/d???c.m. &lt; 5 ??b/sr in the same angular range). The steep rise of the 6H missing mass spectrum at ???3 MeV allows us to derive the lower limit for the possible resonant-state energy in 6H to be 4.5(3) MeV. According to the paring energy estimates, such a 4.5(3) MeV resonance is a realistic candidate for the 6H ground state (g.s.). The obtained results confirm that the decay mechanism of the 7H g.s. (located at 2.2 MeV above the 3H+4n threshold) is the ???true??? (or simultaneous) 4n emission. The resonance energy profiles and the momentum distributions of fragments of the sequential 6H??? 5H(g.s.)+n??? 3H +3n decay were analyzed by the theoretically updated direct four-body-decay and sequential-emission mechanisms. The measured momentum distributions of the 3H fragments in the 6H rest frame indicate very strong ???dineutron-type??? correlations in the 5H ground state decay.

Název v anglickém jazyce

H-6 states studied in the H-2(He-8, He-4) reaction and evidence of an extremely correlated character of the( 5)H ground state

Popis výsledku anglicky

The extremely neutron-rich system 6H was studied in the direct 2H(8He, 4He) 6H transfer reaction with a 26A MeV secondary 8He beam. The measured missing mass spectrum shows a broad bump at ???4???8 MeV above the 3H +3n decay threshold. This bump can be interpreted as a broad resonant state in 6H at 6.8(5) MeV. The population cross section of such a presumably p-wave state (or it may be few overlapping states) in the energy range from 4 to 8 MeV is d??/d???c.m. ??? 190+40???80 ??b/sr in the angular range 5??? &lt; ??c.m. &lt; 16???. The obtained missing mass spectrum is practically free of 6H events below 3.5 MeV (d??/d???c.m. &lt; 5 ??b/sr in the same angular range). The steep rise of the 6H missing mass spectrum at ???3 MeV allows us to derive the lower limit for the possible resonant-state energy in 6H to be 4.5(3) MeV. According to the paring energy estimates, such a 4.5(3) MeV resonance is a realistic candidate for the 6H ground state (g.s.). The obtained results confirm that the decay mechanism of the 7H g.s. (located at 2.2 MeV above the 3H+4n threshold) is the ???true??? (or simultaneous) 4n emission. The resonance energy profiles and the momentum distributions of fragments of the sequential 6H??? 5H(g.s.)+n??? 3H +3n decay were analyzed by the theoretically updated direct four-body-decay and sequential-emission mechanisms. The measured momentum distributions of the 3H fragments in the 6H rest frame indicate very strong ???dineutron-type??? correlations in the 5H ground state decay.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/EF19_073%2F0016951" target="_blank" >EF19_073/0016951: Zvýšení kvality interního grantového schématu Slezské univerzity v Opavě</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

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

105

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

„064605-1“-„064605-15“

Kód UT WoS článku

000820341500001

EID výsledku v databázi Scopus

2-s2.0-85132325489