Magnetic Moments of ^<17>N and ^<17>B

Ueno, H.; Asahi, K.; Izumi, H.; Nagata, K.; Ogawa, H.; Yoshimi, A.; Sato, H.; Adachi, M.; Hori, Y.; Mochinaga, K.; Okuno, H.; Aoi, N.; Ishihara, M.; Yoshida, A.; Liu, G.; Kubo, T.; Fukunishi, N.; Shimoda, T.; Miyatake, H.; Sasaki, M.; Shirakura, T.; Takahashi, N.; Mitsuoka, S.; Schmidt-Ott, W.-D.

doi:https://doi.org/10.1103/PhysRevC.53.2142

Magnetic Moments of ^<17>N and ^<17>B

Ueno, H.; Asahi, K.; Izumi, H. et al.

Physical Review C, 1996, 53(5), 2142-2151

Number of Access:2,984（2025-10-24 12:16 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/23131

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Title	Magnetic Moments of ^<17>N and ^<17>B
Creator	CreatorName Ueno, H.
	CreatorName Asahi, K.
	CreatorName Izumi, H.
	NRID 1000000013491 1000000013491 CreatorName Nagata, K.
	CreatorName Ogawa, H.
	CreatorName Yoshimi, A.
	CreatorName Sato, H.
	CreatorName Adachi, M.
	CreatorName Hori, Y.
	CreatorName Mochinaga, K.
	CreatorName Okuno, H.
	NRID 1000000311647 1000000311647 ORCID 0000-0003-3303-8542 0000-0003-3303-8542 researchmap permalink aoinori aoinori Scopus Author ID 8522086100 8522086100 CreatorName Aoi, N.
	CreatorName Ishihara, M.
	CreatorName Yoshida, A.
	CreatorName Liu, G.
	CreatorName Kubo, T.
	CreatorName Fukunishi, N.
	CreatorName Shimoda, T.
	CreatorName Miyatake, H.
	NRID 1000060089737 1000060089737 CreatorName Sasaki, M.
	CreatorName Shirakura, T.
	CreatorName Takahashi, N.
	CreatorName Mitsuoka, S.
	CreatorName Schmidt-Ott, W.-D.
Abstract	The magnetic moments of ^<17>N and ^<17>B were measured by using spin-polarized radioactive nuclear beams which were obtained from the projectile fragmentation reaction. The observed magnetic moment of ^<17>N, \|μ(^<17>N)\|=(0.352±0.002)μN, where μN is the nuclear magneton, falls outside the Schmidt lines. By virtue of a simplifying feature of nuclear structure inherent in a p_<1/2> valence nucleus, the deviation from the Schmidt value is attributed on firm ground to admixing of the configurations in which two neutrons in the sd shell are coupled to J^π=2^+. This interpretation is confirmed in standard shell-model calculations. The calculations reproduce fairly well the experimentally inferred amount of 2^+ admixture, as well as the experimental magnetic moment itself. The magnetic moment for ^<17>B was determined as ‖μ(^<17>B)‖=(2.545±0.020)μ_N. The result is substantially smaller than the πp_<1/2> single-particle value, and the shell-model calculations indicate that the quenching of μ largely stems from J^π=2^+ configurations of the sd neutrons. The observed amount of quenching, however, is larger than the shell-model predictions, suggesting an enhanced contribution of the 2^+ neutron configurations. This result is explained if the pairing energy for neutrons in the sd shell of a neutron-rich nucleus is assumed to diminish by about 30%. We also find that the use of the reduced pairing energy improves agreements in the magnetic moment and low-lying energy levels of ^<17>N as well.
Publisher	American Physical Society
Source Title	Physical Review C
Volume (Issue)	53(5)
Page	2142-2151
Date of Issued	1996-05
Language	English
Handle URL	https://hdl.handle.net/11094/23131
PISSN	05562813
NCID	AA00773613
Relation.references	URI http://prc.aps.org/abstract/PRC/v53/i5/p2142_1
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1103/PhysRevC.53.2142
Access Rights	open access
CopyRight	Ueno, H. , Asahi, K. , Izumi, H. , Nagata, K. , Ogawa, H. , Yoshimi, A. , Sato, H. , Adachi, M. , Hori, Y. , Mochinaga, K. , Okuno, H. , Aoi, N. , Ishihara, M. , Yoshida, A. , Liu, G. , Kubo, T. , Fukunishi, N. , Shimoda, T. , Miyatake, H. , Sasaki, M. , Shirakura, T. , Takahashi, N. , Mitsuoka, S. , Schmidt-Ott, W.-D., Physical Review C, 53, 2142-2151, 1996 "Copyright (1996) by the American Physical Society."
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Physical Review C. 1996, 53(5), p. 2142-2151
DC.title	Magnetic Moments of ^<17>N and ^<17>B
DC.creator	Ueno, H.
	Asahi, K.
	Izumi, H.
	Nagata, K.
	Ogawa, H.
	Yoshimi, A.
	Sato, H.
	Adachi, M.
	Hori, Y.
	Mochinaga, K.
	Okuno, H.
	Aoi, N.
	Ishihara, M.
	Yoshida, A.
	Liu, G.
	Kubo, T.
	Fukunishi, N.
	Shimoda, T.
	Miyatake, H.
	Sasaki, M.
	Shirakura, T.
	Takahashi, N.
	Mitsuoka, S.
	Schmidt-Ott, W.-D.
DC.publisher	American Physical Society
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	1996-05
DC.identifier	https://doi.org/10.1103/PhysRevC.53.2142
DC.relation' scheme='DCTERMS.URI	http://prc.aps.org/abstract/PRC/v53/i5/p2142_1
DCTERMS.abstract	The magnetic moments of ^<17>N and ^<17>B were measured by using spin-polarized radioactive nuclear beams which were obtained from the projectile fragmentation reaction. The observed magnetic moment of ^<17>N, \|μ(^<17>N)\|=(0.352±0.002)μN, where μN is the nuclear magneton, falls outside the Schmidt lines. By virtue of a simplifying feature of nuclear structure inherent in a p_<1/2> valence nucleus, the deviation from the Schmidt value is attributed on firm ground to admixing of the configurations in which two neutrons in the sd shell are coupled to J^π=2^+. This interpretation is confirmed in standard shell-model calculations. The calculations reproduce fairly well the experimentally inferred amount of 2^+ admixture, as well as the experimental magnetic moment itself. The magnetic moment for ^<17>B was determined as ‖μ(^<17>B)‖=(2.545±0.020)μ_N. The result is substantially smaller than the πp_<1/2> single-particle value, and the shell-model calculations indicate that the quenching of μ largely stems from J^π=2^+ configurations of the sd neutrons. The observed amount of quenching, however, is larger than the shell-model predictions, suggesting an enhanced contribution of the 2^+ neutron configurations. This result is explained if the pairing energy for neutrons in the sd shell of a neutron-rich nucleus is assumed to diminish by about 30%. We also find that the use of the reduced pairing energy improves agreements in the magnetic moment and low-lying energy levels of ^<17>N as well.
DC.rights	Ueno, H. , Asahi, K. , Izumi, H. , Nagata, K. , Ogawa, H. , Yoshimi, A. , Sato, H. , Adachi, M. , Hori, Y. , Mochinaga, K. , Okuno, H. , Aoi, N. , Ishihara, M. , Yoshida, A. , Liu, G. , Kubo, T. , Fukunishi, N. , Shimoda, T. , Miyatake, H. , Sasaki, M. , Shirakura, T. , Takahashi, N. , Mitsuoka, S. , Schmidt-Ott, W.-D., Physical Review C, 53, 2142-2151, 1996 "Copyright (1996) by the American Physical Society."
DC.format	23131
citation_title	Magnetic Moments of ^<17>N and ^<17>B
citation_author	Ueno, H.
	Asahi, K.
	Izumi, H.
	Nagata, K.
	Ogawa, H.
	Yoshimi, A.
	Sato, H.
	Adachi, M.
	Hori, Y.
	Mochinaga, K.
	Okuno, H.
	Aoi, N.
	Ishihara, M.
	Yoshida, A.
	Liu, G.
	Kubo, T.
	Fukunishi, N.
	Shimoda, T.
	Miyatake, H.
	Sasaki, M.
	Shirakura, T.
	Takahashi, N.
	Mitsuoka, S.
	Schmidt-Ott, W.-D.
citation_publisher	American Physical Society
citation_language	English
citation_date	1996-05
citation_journal_title	Physical Review C
citation_volume	53
citation_issue	5
citation_firstpage	2142
citation_lastpage	2151
citation_doi	https://doi.org/10.1103/PhysRevC.53.2142
citation_public_url	https://hdl.handle.net/11094/23131
citation_abstract_html_url	http://prc.aps.org/abstract/PRC/v53/i5/p2142_1

Magnetic Moments of ^<17>N and ^<17>B

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