Unbound states studied by direct reactions

R. Wolski; M. S. Golovkov; L. V. Grigorenko; A. S. Fomichev; S. A. Krupko; S. I. Sidorchuk; S. V. Stepantsov; R. S. Slepnev; G. M. Ter-Akopian; L. Standylo; Y. M. Tchuvil'Sky; D. y. Pang

doi:10.1088/1742-6596/111/1/012031

Unbound states studied by direct reactions

R. Wolski^*
, M. S. Golovkov
, L. V. Grigorenko
, A. S. Fomichev
, S. A. Krupko
, S. I. Sidorchuk
, S. V. Stepantsov
, R. S. Slepnev
, G. M. Ter-Akopian
, L. Standylo
, Y. M. Tchuvil'Sky
, D. y. Pang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The t(⁶He,⁸He)p t(⁸He,¹⁰He)p reactions were studied in experiments with 25A MeV ⁶He beam and 27.4A MeV ⁸He beams and an unique tritium gas target. Results on the ⁸He and ¹⁰He excitation energy spectra are presented. The ⁸He spectrum exhibits 3 states, apart of the ground state and known (2⁺) state at 3.6 MeV, the third state is seen at 5.4 MeV. A tentative assignment 1⁺ is proposed for this structure. The ¹⁰He spectrum shows no event at the excitation energy below 3 MeV what is in contradiction with the earlier reports on this nucleus. A high statistics of α-n coincidence events collected for the ⁸He beam run has been subjected to analysis in order search for the bound tetraneutron. The search produced a negative result.

Original language	English
Article number	012031
Journal	Journal of Physics: Conference Series
Volume	111
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/111/1/012031
State	Published - 1 May 2008
Externally published	Yes

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10.1088/1742-6596/111/1/012031

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title = "Unbound states studied by direct reactions",

abstract = "The t(6He,8He)p t(8He,10He)p reactions were studied in experiments with 25A MeV 6He beam and 27.4A MeV 8He beams and an unique tritium gas target. Results on the 8He and 10He excitation energy spectra are presented. The 8He spectrum exhibits 3 states, apart of the ground state and known (2+) state at 3.6 MeV, the third state is seen at 5.4 MeV. A tentative assignment 1+ is proposed for this structure. The 10He spectrum shows no event at the excitation energy below 3 MeV what is in contradiction with the earlier reports on this nucleus. A high statistics of α-n coincidence events collected for the 8He beam run has been subjected to analysis in order search for the bound tetraneutron. The search produced a negative result.",

author = "R. Wolski and Golovkov, \{M. S.\} and Grigorenko, \{L. V.\} and Fomichev, \{A. S.\} and Krupko, \{S. A.\} and Sidorchuk, \{S. I.\} and Stepantsov, \{S. V.\} and Slepnev, \{R. S.\} and Ter-Akopian, \{G. M.\} and L. Standylo and Tchuvil'Sky, \{Y. M.\} and Pang, \{D. y.\}",

year = "2008",

month = may,

day = "1",

doi = "10.1088/1742-6596/111/1/012031",

language = "英语",

volume = "111",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

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T1 - Unbound states studied by direct reactions

AU - Wolski, R.

AU - Golovkov, M. S.

AU - Grigorenko, L. V.

AU - Fomichev, A. S.

AU - Krupko, S. A.

AU - Sidorchuk, S. I.

AU - Stepantsov, S. V.

AU - Slepnev, R. S.

AU - Ter-Akopian, G. M.

AU - Standylo, L.

AU - Tchuvil'Sky, Y. M.

AU - Pang, D. y.

PY - 2008/5/1

Y1 - 2008/5/1

N2 - The t(6He,8He)p t(8He,10He)p reactions were studied in experiments with 25A MeV 6He beam and 27.4A MeV 8He beams and an unique tritium gas target. Results on the 8He and 10He excitation energy spectra are presented. The 8He spectrum exhibits 3 states, apart of the ground state and known (2+) state at 3.6 MeV, the third state is seen at 5.4 MeV. A tentative assignment 1+ is proposed for this structure. The 10He spectrum shows no event at the excitation energy below 3 MeV what is in contradiction with the earlier reports on this nucleus. A high statistics of α-n coincidence events collected for the 8He beam run has been subjected to analysis in order search for the bound tetraneutron. The search produced a negative result.

AB - The t(6He,8He)p t(8He,10He)p reactions were studied in experiments with 25A MeV 6He beam and 27.4A MeV 8He beams and an unique tritium gas target. Results on the 8He and 10He excitation energy spectra are presented. The 8He spectrum exhibits 3 states, apart of the ground state and known (2+) state at 3.6 MeV, the third state is seen at 5.4 MeV. A tentative assignment 1+ is proposed for this structure. The 10He spectrum shows no event at the excitation energy below 3 MeV what is in contradiction with the earlier reports on this nucleus. A high statistics of α-n coincidence events collected for the 8He beam run has been subjected to analysis in order search for the bound tetraneutron. The search produced a negative result.

UR - https://www.scopus.com/pages/publications/44649167646

U2 - 10.1088/1742-6596/111/1/012031

DO - 10.1088/1742-6596/111/1/012031

M3 - 文章

AN - SCOPUS:44649167646

SN - 1742-6588

VL - 111

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012031

ER -

Unbound states studied by direct reactions

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