Resonant states in H-7: Experimental studies of the H-2(He-8, He-3) reaction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F21%3AA0000142" target="_blank" >RIV/47813059:19630/21:A0000142 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prc/abstract/10.1103/PhysRevC.103.044313" target="_blank" >https://journals.aps.org/prc/abstract/10.1103/PhysRevC.103.044313</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.103.044313" target="_blank" >10.1103/PhysRevC.103.044313</a>
Alternative languages
Result language
angličtina
Original language name
Resonant states in H-7: Experimental studies of the H-2(He-8, He-3) reaction
Original language description
The extremely neutron-rich system H-7 was studied in the direct H-2(He-8, He-3) H-7 transfer reaction with a 26 A MeV secondary He-8 beam [Bezbakh et al., Phys. Rev. Lett. 124, 022502 (2020)]. The missing mass spectrum and center-of-mass angular distributions of H-7, as well as the momentum distribution of the H-3 fragment in the H-7 frame, were constructed. In addition, we carried out another experiment with the same beam but a modified setup, which was cross-checked by the study of the H-2(Be-10, He-3) Li-9 reaction. A solid experimental evidence is provided that two resonant states of H-7 are located in its spectrum at 2.2(5) and 5.5(3) MeV relative to the H-3 +4n decay threshold. Also, there are indications that the resonant states at 7.5(3) and 11.0(3) MeV are present in the measured H-7 spectrum. Based on the energy and angular distributions, obtained for the studied H-2(He-8, He-3) H-7 reaction, the weakly populated 2.2(5)-MeV peak is ascribed to the H-7 ground state. It is highly plausible that the firmly ascertained 5.5(3)-MeV state is the 5/2(+) member of the H-7 excitation 5/2(+)-3/2(+) doublet, built on the 2(+) configuration of valence neutrons. The supposed 7.5-MeV state can be another member of this doublet, which could not be resolved in Bezbakh et al. [Phys. Rev. Lett. 124, 022502 (2020)]. Consequently, the two doublet members appeared in the spectrum of H-7 in the work mentioned above as a single broad 6.5-MeV peak.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review C
ISSN
2469-9985
e-ISSN
2469-9993
Volume of the periodical
103
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
„044313-1“-„044313-15“
UT code for WoS article
000647601300001
EID of the result in the Scopus database
2-s2.0-85104793019