Spin-parity assignments in ^<15>C^* by a new method : β-delayed spectroscopy for a spin-polarized nucleus

Miyatake, H.; Ueno, H.; Yamamoto, Y.; Aoi, N.; Asahi, K.; Ideguchi, E.; Ishihara, M.; Izumi, H.; Kishida, T.; Kubo, T.; Mitsuoka, S.; Mizoi, Y.; Notani, M.; Ogawa, H.; Ozawa, A.; Sasaki, M.; Shimoda, T.; Shirakura, T.; Takahashi, N.; Tanimoto, S.; Yoneda, K.

doi:info:doi/10.1103/PhysRevC.67.014306

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タイトル	Spin-parity assignments in ^<15>C^* by a new method : β-delayed spectroscopy for a spin-polarized nucleus
著者	Miyatake, H. Miyatake, H.
	Ueno, H. Ueno, H.
	Yamamoto, Y. Yamamoto, Y.
	Aoi, N. Aoi, N.
	Asahi, K. Asahi, K.
	Ideguchi, E. Ideguchi, E.
	Ishihara, M. Ishihara, M.
	Izumi, H. Izumi, H.
	Kishida, T. Kishida, T.
	Kubo, T. Kubo, T.
	Mitsuoka, S. Mitsuoka, S.
	Mizoi, Y. Mizoi, Y.
	Notani, M. Notani, M.
	Ogawa, H. Ogawa, H.
	Ozawa, A. Ozawa, A.
	Sasaki, M. Sasaki, M.
	Shimoda, T. Shimoda, T.
	Shirakura, T. Shirakura, T.
	Takahashi, N. Takahashi, N.
	Tanimoto, S. Tanimoto, S.
	Yoneda, K. Yoneda, K.
抄録	We propose a method of spin-parity assignments in decay spectroscopy. Its feasibility was tested for the β-delayed neutron decay of spin-polarized ^<15>B. The β-decay asymmetries were measured in coincidence with the delayed neutrons, and the AP values were evaluated for five allowed transitions leading to the excited states in ^<15>C (E_x=3.103, 4.220, 4.657, 5.866, and 6.426 MeV). The spin parities of the former three states were uniquely assigned as 1/2^-, 5/2^-, and 3/2^-, respectively. These assignments are consistent with the previous assignments. Because of insufficient statistics for the 5.866-MeV state (1/2^-), an incorrect assignment (3/2^-) could not be excluded within the 1σ deviation. The spin-parity of the 6.417-MeV state is suggested to be 1/2^-. The peak analysis with detector response in the neutron time of flight spectra enabled precise determinations of the level energies and widths. The level widths were determined for the first time. The present method is also applicable for β-delayed proton, α, and γ decays, and it can be a powerful tool for spectroscopic studies of nuclei far from the stability.
公開者	American Physical Society
掲載誌名	Physical Review C
巻	67
号	1
開始ページ	014306
刊行年月	2003-01-17
ISSN	05562813
NCID	AA00773613
DOI (出版社版)	info:doi/10.1103/PhysRevC.67.014306
URL	http://hdl.handle.net/11094/23139
関連情報 (references)	http://prc.aps.org/abstract/PRC/v67/i1/e014306
権利情報	Miyatake, H. , Ueno, H. , Yamamoto, Y. , Aoi, N. , Asahi, K. , Ideguchi, E. , Ishihara, M. , Izumi, H. , Kishida, T. , Kubo, T. , Mitsuoka, S. , Mizoi, Y. , Notani, M. , Ogawa, H. , Ozawa, A. , Sasaki, M. , Shimoda, T. , Shirakura, T. , Takahashi, N. , Tanimoto, S. , Yoneda, K., Physical Review C, 67, 014306, 2003 "Copyright (2003) by the American Physical Society."
言語	英語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	publisher
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Physical Review C.67(1) P.014306
DC.title	Spin-parity assignments in ^<15>C^* by a new method : β-delayed spectroscopy for a spin-polarized nucleus
DC.creator	Miyatake, H.
	Ueno, H.
	Yamamoto, Y.
	Aoi, N.
	Asahi, K.
	Ideguchi, E.
	Ishihara, M.
	Izumi, H.
	Kishida, T.
	Kubo, T.
	Mitsuoka, S.
	Mizoi, Y.
	Notani, M.
	Ogawa, H.
	Ozawa, A.
	Sasaki, M.
	Shimoda, T.
	Shirakura, T.
	Takahashi, N.
	Tanimoto, S.
	Yoneda, K.
DC.publisher	American Physical Society
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2003-01-17
DC.identifier	info:doi/10.1103/PhysRevC.67.014306
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/23139
DCTERMS.abstract	We propose a method of spin-parity assignments in decay spectroscopy. Its feasibility was tested for the β-delayed neutron decay of spin-polarized ^<15>B. The β-decay asymmetries were measured in coincidence with the delayed neutrons, and the AP values were evaluated for five allowed transitions leading to the excited states in ^<15>C (E_x=3.103, 4.220, 4.657, 5.866, and 6.426 MeV). The spin parities of the former three states were uniquely assigned as 1/2^-, 5/2^-, and 3/2^-, respectively. These assignments are consistent with the previous assignments. Because of insufficient statistics for the 5.866-MeV state (1/2^-), an incorrect assignment (3/2^-) could not be excluded within the 1σ deviation. The spin-parity of the 6.417-MeV state is suggested to be 1/2^-. The peak analysis with detector response in the neutron time of flight spectra enabled precise determinations of the level energies and widths. The level widths were determined for the first time. The present method is also applicable for β-delayed proton, α, and γ decays, and it can be a powerful tool for spectroscopic studies of nuclei far from the stability.
DC.rights	Miyatake, H. , Ueno, H. , Yamamoto, Y. , Aoi, N. , Asahi, K. , Ideguchi, E. , Ishihara, M. , Izumi, H. , Kishida, T. , Kubo, T. , Mitsuoka, S. , Mizoi, Y. , Notani, M. , Ogawa, H. , Ozawa, A. , Sasaki, M. , Shimoda, T. , Shirakura, T. , Takahashi, N. , Tanimoto, S. , Yoneda, K., Physical Review C, 67, 014306, 2003 "Copyright (2003) by the American Physical Society."
citation_title	Spin-parity assignments in ^<15>C^* by a new method : β-delayed spectroscopy for a spin-polarized nucleus
citation_author	Miyatake, H.
	Ueno, H.
	Yamamoto, Y.
	Aoi, N.
	Asahi, K.
	Ideguchi, E.
	Ishihara, M.
	Izumi, H.
	Kishida, T.
	Kubo, T.
	Mitsuoka, S.
	Mizoi, Y.
	Notani, M.
	Ogawa, H.
	Ozawa, A.
	Sasaki, M.
	Shimoda, T.
	Shirakura, T.
	Takahashi, N.
	Tanimoto, S.
	Yoneda, K.
citation_publisher	American Physical Society
citation_language	英語
citation_date	2003-01-17
citation_journal_title	Physical Review C
citation_volume	67
citation_issue	1
citation_firstpage	014306
citation_issn	05562813
citation_doi	info:doi/10.1103/PhysRevC.67.014306
citation_public_url	http://hdl.handle.net/11094/23139

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