Recoil proton tagged knockout reaction for 8He

Z. X. Cao; Y. L. Ye; J. Xiao; L. H. Lv; D. X. Jiang; T. Zheng; H. Hua; Z. H. Li; X. Q. Li; Y. C. Ge; J. L. Lou; R. Qiao; Q. T. Li; H. B. You; R. J. Chen; D. Y. Pang; H. Sakurai; H. Otsu; M. Nishimura; S. Sakaguchi; H. Baba; Y. Togano; K. Yoneda; C. Li; S. Wang; H. Wang; K. A. Li; T. Nakamura; Y. Nakayama; Y. Kondo; S. Deguchi; Y. Satou; K. Tshoo

doi:10.1016/j.physletb.2011.12.009

Recoil proton tagged knockout reaction for ⁸He

Z. X. Cao, Y. L. Ye, J. Xiao, L. H. Lv, D. X. Jiang, T. Zheng, H. Hua, Z. H. Li, X. Q. Li, Y. C. Ge, J. L. Lou, R. Qiao, Q. T. Li, H. B. You, R. J. Chen, D. Y. Pang, H. Sakurai, H. Otsu, M. Nishimura, S. SakaguchiH. Baba, Y. Togano, K. Yoneda, C. Li, S. Wang, H. Wang, K. A. Li, T. Nakamura, Y. Nakayama, Y. Kondo, S. Deguchi, Y. Satou, K. Tshoo

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

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Abstract

We report for the first time the discrimination of the core fragment knockout and valence nucleon knockout reaction mechanisms at medium energy range, by the use of the recoil proton tagging technique. Intense ⁸He beams at 82.3 MeV/u were supplied by the RIPS beam line at RIKEN, and impinged on both hydrogen and carbon targets. Recoil protons were detected in coincidence with the forward moving core fragments and neutrons. The core fragment knockout mechanism is identified through the polar angle correlation and checked by various kinematics relations. This mechanism may be used to extract the cluster structure information of unstable nuclei. On the other hand, with the selection of the tagged valence nucleon knockout mechanism, a narrower peak of ⁷He ground state is obtained. The extracted neutron spectroscopic factor S _n=0.512(18) is relatively smaller than the no-tagged one, and is in good agreement with the prediction of ab initio Green's function Monte Carlo calculations.

Original language	English
Pages (from-to)	46-51
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	707
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2011.12.009
Publication status	Published - Jan 16 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2011.12.009

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Cao, Z. X., Ye, Y. L., Xiao, J., Lv, L. H., Jiang, D. X., Zheng, T., Hua, H., Li, Z. H., Li, X. Q., Ge, Y. C., Lou, J. L., Qiao, R., Li, Q. T., You, H. B., Chen, R. J., Pang, D. Y., Sakurai, H., Otsu, H., Nishimura, M., ... Tshoo, K. (2012). Recoil proton tagged knockout reaction for ⁸He. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 707(1), 46-51. https://doi.org/10.1016/j.physletb.2011.12.009

Cao, ZX, Ye, YL, Xiao, J, Lv, LH, Jiang, DX, Zheng, T, Hua, H, Li, ZH, Li, XQ, Ge, YC, Lou, JL, Qiao, R, Li, QT, You, HB, Chen, RJ, Pang, DY, Sakurai, H, Otsu, H, Nishimura, M, Sakaguchi, S, Baba, H, Togano, Y, Yoneda, K, Li, C, Wang, S, Wang, H, Li, KA, Nakamura, T, Nakayama, Y, Kondo, Y, Deguchi, S, Satou, Y & Tshoo, K 2012, 'Recoil proton tagged knockout reaction for ⁸He', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 707, no. 1, pp. 46-51. https://doi.org/10.1016/j.physletb.2011.12.009

@article{4ad05a990a444311b008ad8ab09b68ac,

title = "Recoil proton tagged knockout reaction for 8He",

abstract = "We report for the first time the discrimination of the core fragment knockout and valence nucleon knockout reaction mechanisms at medium energy range, by the use of the recoil proton tagging technique. Intense 8He beams at 82.3 MeV/u were supplied by the RIPS beam line at RIKEN, and impinged on both hydrogen and carbon targets. Recoil protons were detected in coincidence with the forward moving core fragments and neutrons. The core fragment knockout mechanism is identified through the polar angle correlation and checked by various kinematics relations. This mechanism may be used to extract the cluster structure information of unstable nuclei. On the other hand, with the selection of the tagged valence nucleon knockout mechanism, a narrower peak of 7He ground state is obtained. The extracted neutron spectroscopic factor S n=0.512(18) is relatively smaller than the no-tagged one, and is in good agreement with the prediction of ab initio Green's function Monte Carlo calculations.",

author = "Cao, {Z. X.} and Ye, {Y. L.} and J. Xiao and Lv, {L. H.} and Jiang, {D. X.} and T. Zheng and H. Hua and Li, {Z. H.} and Li, {X. Q.} and Ge, {Y. C.} and Lou, {J. L.} and R. Qiao and Li, {Q. T.} and You, {H. B.} and Chen, {R. J.} and Pang, {D. Y.} and H. Sakurai and H. Otsu and M. Nishimura and S. Sakaguchi and H. Baba and Y. Togano and K. Yoneda and C. Li and S. Wang and H. Wang and Li, {K. A.} and T. Nakamura and Y. Nakayama and Y. Kondo and S. Deguchi and Y. Satou and K. Tshoo",

note = "Funding Information: The authors acknowledge very helpful discussions with Prof. B. Tsang of MSU, Prof. P.M. Walker of the University of Surrey and Prof. F. Xu of the Peking University. This work is supported by the National Natural Science Foundation of China (Nos. 11035001 , 10775003 , 10821140159 , 10905002 ), the National Basic Research Program of China (No. 2007CB815002 ), the Grant-in-Aid for Scientific Research of MEXT Japan (No. 15740145 ), and the WCU program of NRF Korea (No. R32-2008-000-10155-0 ).",

year = "2012",

month = jan,

day = "16",

doi = "10.1016/j.physletb.2011.12.009",

language = "English",

volume = "707",

pages = "46--51",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Recoil proton tagged knockout reaction for 8He

AU - Cao, Z. X.

AU - Ye, Y. L.

AU - Xiao, J.

AU - Lv, L. H.

AU - Jiang, D. X.

AU - Zheng, T.

AU - Hua, H.

AU - Li, Z. H.

AU - Li, X. Q.

AU - Ge, Y. C.

AU - Lou, J. L.

AU - Qiao, R.

AU - Li, Q. T.

AU - You, H. B.

AU - Chen, R. J.

AU - Pang, D. Y.

AU - Sakurai, H.

AU - Otsu, H.

AU - Nishimura, M.

AU - Sakaguchi, S.

AU - Baba, H.

AU - Togano, Y.

AU - Yoneda, K.

AU - Li, C.

AU - Wang, S.

AU - Wang, H.

AU - Li, K. A.

AU - Nakamura, T.

AU - Nakayama, Y.

AU - Kondo, Y.

AU - Deguchi, S.

AU - Satou, Y.

AU - Tshoo, K.

N1 - Funding Information: The authors acknowledge very helpful discussions with Prof. B. Tsang of MSU, Prof. P.M. Walker of the University of Surrey and Prof. F. Xu of the Peking University. This work is supported by the National Natural Science Foundation of China (Nos. 11035001 , 10775003 , 10821140159 , 10905002 ), the National Basic Research Program of China (No. 2007CB815002 ), the Grant-in-Aid for Scientific Research of MEXT Japan (No. 15740145 ), and the WCU program of NRF Korea (No. R32-2008-000-10155-0 ).

PY - 2012/1/16

Y1 - 2012/1/16

N2 - We report for the first time the discrimination of the core fragment knockout and valence nucleon knockout reaction mechanisms at medium energy range, by the use of the recoil proton tagging technique. Intense 8He beams at 82.3 MeV/u were supplied by the RIPS beam line at RIKEN, and impinged on both hydrogen and carbon targets. Recoil protons were detected in coincidence with the forward moving core fragments and neutrons. The core fragment knockout mechanism is identified through the polar angle correlation and checked by various kinematics relations. This mechanism may be used to extract the cluster structure information of unstable nuclei. On the other hand, with the selection of the tagged valence nucleon knockout mechanism, a narrower peak of 7He ground state is obtained. The extracted neutron spectroscopic factor S n=0.512(18) is relatively smaller than the no-tagged one, and is in good agreement with the prediction of ab initio Green's function Monte Carlo calculations.

AB - We report for the first time the discrimination of the core fragment knockout and valence nucleon knockout reaction mechanisms at medium energy range, by the use of the recoil proton tagging technique. Intense 8He beams at 82.3 MeV/u were supplied by the RIPS beam line at RIKEN, and impinged on both hydrogen and carbon targets. Recoil protons were detected in coincidence with the forward moving core fragments and neutrons. The core fragment knockout mechanism is identified through the polar angle correlation and checked by various kinematics relations. This mechanism may be used to extract the cluster structure information of unstable nuclei. On the other hand, with the selection of the tagged valence nucleon knockout mechanism, a narrower peak of 7He ground state is obtained. The extracted neutron spectroscopic factor S n=0.512(18) is relatively smaller than the no-tagged one, and is in good agreement with the prediction of ab initio Green's function Monte Carlo calculations.

UR - http://www.scopus.com/inward/record.url?scp=84855199034&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84855199034&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2011.12.009

DO - 10.1016/j.physletb.2011.12.009

M3 - Article

AN - SCOPUS:84855199034

SN - 0370-2693

VL - 707

SP - 46

EP - 51

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Recoil proton tagged knockout reaction for ⁸He

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