γ transitions in A = 7 hypernuclei and a possible derivation of hypernuclear size

Emiko Hiyama, M. Kamimura, K. Miyazaki, T. Motoba

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

On the basis of the 5 ΛHe + N + N three-body model which has successfully been applied to a systematic study of the energy and nucleon halo structure of the A = 7 isotriplet hypernuclei, strengths of γ transitions in 7 ΛLi and 7 ΛHe are calculated. The new model confirms that the B(E2;5/2+→1/2+) value in 7 ΛLi is reduced remarkably in comparison with the corresponding B(E2;3+→1+) in the core nucleus 6Li. This is due to the gluelike role of the Λ particle which induces a contraction of the core nuclear size. It is suggested that a measurement of the 5/2+→1/2+E2 transition rate in 7 ΛLi (ongoing at KEK as E419) provides a unique opportunity to derive the hypernuclear size and hence to confirm the size contraction experimentally. The E2 and M1 transition strengths are also predicted for low-lying states in the hypernucleus 7 ΛHe whose core nucleus 6He is known to have a neutron halo. Another prediction is made of much enhanced E2 transitions in 7 ΛLi from the 5/2+ and 3/2+(T=1) states which are expected to have a proton halo structure.

Original languageEnglish
Pages (from-to)2351-2360
Number of pages10
JournalPhysical Review C - Nuclear Physics
Volume59
Issue number5
Publication statusPublished - Jan 1 1999
Externally publishedYes

Fingerprint

hypernuclei
derivation
halos
contraction
nuclei
neutrons
protons
predictions
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

γ transitions in A = 7 hypernuclei and a possible derivation of hypernuclear size. / Hiyama, Emiko; Kamimura, M.; Miyazaki, K.; Motoba, T.

In: Physical Review C - Nuclear Physics, Vol. 59, No. 5, 01.01.1999, p. 2351-2360.

Research output: Contribution to journalArticle

Hiyama, Emiko ; Kamimura, M. ; Miyazaki, K. ; Motoba, T. / γ transitions in A = 7 hypernuclei and a possible derivation of hypernuclear size. In: Physical Review C - Nuclear Physics. 1999 ; Vol. 59, No. 5. pp. 2351-2360.
@article{a63b94bece894d56994712cc0b670dc2,
title = "γ transitions in A = 7 hypernuclei and a possible derivation of hypernuclear size",
abstract = "On the basis of the 5 ΛHe + N + N three-body model which has successfully been applied to a systematic study of the energy and nucleon halo structure of the A = 7 isotriplet hypernuclei, strengths of γ transitions in 7 ΛLi and 7 ΛHe are calculated. The new model confirms that the B(E2;5/2+→1/2+) value in 7 ΛLi is reduced remarkably in comparison with the corresponding B(E2;3+→1+) in the core nucleus 6Li. This is due to the gluelike role of the Λ particle which induces a contraction of the core nuclear size. It is suggested that a measurement of the 5/2+→1/2+E2 transition rate in 7 ΛLi (ongoing at KEK as E419) provides a unique opportunity to derive the hypernuclear size and hence to confirm the size contraction experimentally. The E2 and M1 transition strengths are also predicted for low-lying states in the hypernucleus 7 ΛHe whose core nucleus 6He is known to have a neutron halo. Another prediction is made of much enhanced E2 transitions in 7 ΛLi from the 5/2+ and 3/2+(T=1) states which are expected to have a proton halo structure.",
author = "Emiko Hiyama and M. Kamimura and K. Miyazaki and T. Motoba",
year = "1999",
month = "1",
day = "1",
language = "English",
volume = "59",
pages = "2351--2360",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - γ transitions in A = 7 hypernuclei and a possible derivation of hypernuclear size

AU - Hiyama, Emiko

AU - Kamimura, M.

AU - Miyazaki, K.

AU - Motoba, T.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - On the basis of the 5 ΛHe + N + N three-body model which has successfully been applied to a systematic study of the energy and nucleon halo structure of the A = 7 isotriplet hypernuclei, strengths of γ transitions in 7 ΛLi and 7 ΛHe are calculated. The new model confirms that the B(E2;5/2+→1/2+) value in 7 ΛLi is reduced remarkably in comparison with the corresponding B(E2;3+→1+) in the core nucleus 6Li. This is due to the gluelike role of the Λ particle which induces a contraction of the core nuclear size. It is suggested that a measurement of the 5/2+→1/2+E2 transition rate in 7 ΛLi (ongoing at KEK as E419) provides a unique opportunity to derive the hypernuclear size and hence to confirm the size contraction experimentally. The E2 and M1 transition strengths are also predicted for low-lying states in the hypernucleus 7 ΛHe whose core nucleus 6He is known to have a neutron halo. Another prediction is made of much enhanced E2 transitions in 7 ΛLi from the 5/2+ and 3/2+(T=1) states which are expected to have a proton halo structure.

AB - On the basis of the 5 ΛHe + N + N three-body model which has successfully been applied to a systematic study of the energy and nucleon halo structure of the A = 7 isotriplet hypernuclei, strengths of γ transitions in 7 ΛLi and 7 ΛHe are calculated. The new model confirms that the B(E2;5/2+→1/2+) value in 7 ΛLi is reduced remarkably in comparison with the corresponding B(E2;3+→1+) in the core nucleus 6Li. This is due to the gluelike role of the Λ particle which induces a contraction of the core nuclear size. It is suggested that a measurement of the 5/2+→1/2+E2 transition rate in 7 ΛLi (ongoing at KEK as E419) provides a unique opportunity to derive the hypernuclear size and hence to confirm the size contraction experimentally. The E2 and M1 transition strengths are also predicted for low-lying states in the hypernucleus 7 ΛHe whose core nucleus 6He is known to have a neutron halo. Another prediction is made of much enhanced E2 transitions in 7 ΛLi from the 5/2+ and 3/2+(T=1) states which are expected to have a proton halo structure.

UR - http://www.scopus.com/inward/record.url?scp=0033247357&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033247357&partnerID=8YFLogxK

M3 - Article

VL - 59

SP - 2351

EP - 2360

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

ER -