Decoupling of valence neutrons from the core in 16C

Z. Elekes; Zs Dombrádi; A. Krasznahorkay; H. Baba; M. Csatlós; L. Csige; N. Fukuda; Zs Fülöp; Z. Gácsi; J. Gulyás; N. Iwasa; H. Kinugawa; S. Kubono; M. Kurokawa; X. Liu; S. Michimasa; T. Minemura; T. Motobayashi; A. Ozawa; A. Saito; S. Shimoura; S. Takeuchi; I. Tanihata; P. Thirolf; Y. Yanagisawa; K. Yoshida

doi:10.1016/j.physletb.2004.02.022

Decoupling of valence neutrons from the core in ¹⁶C

Z. Elekes, Zs Dombrádi, A. Krasznahorkay, H. Baba, M. Csatlós, L. Csige, N. Fukuda, Zs Fülöp, Z. Gácsi, J. Gulyás, N. Iwasa, H. Kinugawa, S. Kubono, M. Kurokawa, X. Liu, S. Michimasa, T. Minemura, T. Motobayashi, A. Ozawa, A. SaitoS. Shimoura, S. Takeuchi, I. Tanihata, P. Thirolf, Y. Yanagisawa, K. Yoshida

SCI - Physics

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

72 Citations (Scopus)

Abstract

The neutron and proton excitations in ¹⁶C nucleus have been investigated by use of the Coulomb-nuclear interference method applied to the ²⁰⁸Pb+¹⁶C inelastic scattering. Angular distribution of the ¹⁶C nuclei in the inelastic channel populating the first 2 ⁺ state has been measured. The neutron and proton transition matrix elements, M_n and M_p, have been determined from the "Coulomb" and "matter" deformation-length parameters obtained by distorted wave calculations. The M_p or its corresponding B(E2;2⁺₁→0⁺) value was found to be extremely small: 0.28±0.06 Weisskopf units consistent with a recent lifetime measurement. Furthermore, the extracted M_n/M_p ratio has an unexpectedly large value of 7.6±1.7. These results suggest that the 2⁺₁ state in ¹⁶C is a nearly pure valence neutron excitation. copy; 2004 Published by Elsevier B.V.

Original language	English
Pages (from-to)	34-40
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	586
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2004.02.022
Publication status	Published - 2004 Apr 22

Keywords

21.10.Gv
24.10.Eq
25.70.De
27.20.+n
29.30.Kv
Angular distribution
Coulomb excitation of C
Distorted wave calculation
Neutron and proton transition matrix elements

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2004.02.022

Cite this

Elekes, Z., Dombrádi, Z., Krasznahorkay, A., Baba, H., Csatlós, M., Csige, L., Fukuda, N., Fülöp, Z., Gácsi, Z., Gulyás, J., Iwasa, N., Kinugawa, H., Kubono, S., Kurokawa, M., Liu, X., Michimasa, S., Minemura, T., Motobayashi, T., Ozawa, A., ... Yoshida, K. (2004). Decoupling of valence neutrons from the core in ¹⁶C. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 586(1-2), 34-40. https://doi.org/10.1016/j.physletb.2004.02.022

Elekes, Z, Dombrádi, Z, Krasznahorkay, A, Baba, H, Csatlós, M, Csige, L, Fukuda, N, Fülöp, Z, Gácsi, Z, Gulyás, J, Iwasa, N, Kinugawa, H, Kubono, S, Kurokawa, M, Liu, X, Michimasa, S, Minemura, T, Motobayashi, T, Ozawa, A, Saito, A, Shimoura, S, Takeuchi, S, Tanihata, I, Thirolf, P, Yanagisawa, Y & Yoshida, K 2004, 'Decoupling of valence neutrons from the core in ¹⁶C', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 586, no. 1-2, pp. 34-40. https://doi.org/10.1016/j.physletb.2004.02.022

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title = "Decoupling of valence neutrons from the core in 16C",

abstract = "The neutron and proton excitations in 16C nucleus have been investigated by use of the Coulomb-nuclear interference method applied to the 208Pb+16C inelastic scattering. Angular distribution of the 16C nuclei in the inelastic channel populating the first 2 + state has been measured. The neutron and proton transition matrix elements, Mn and Mp, have been determined from the {"}Coulomb{"} and {"}matter{"} deformation-length parameters obtained by distorted wave calculations. The Mp or its corresponding B(E2;2+1→0+) value was found to be extremely small: 0.28±0.06 Weisskopf units consistent with a recent lifetime measurement. Furthermore, the extracted Mn/Mp ratio has an unexpectedly large value of 7.6±1.7. These results suggest that the 2+1 state in 16C is a nearly pure valence neutron excitation. copy; 2004 Published by Elsevier B.V.",

keywords = "21.10.Gv, 24.10.Eq, 25.70.De, 27.20.+n, 29.30.Kv, Angular distribution, Coulomb excitation of C, Distorted wave calculation, Neutron and proton transition matrix elements",

author = "Z. Elekes and Zs Dombr{\'a}di and A. Krasznahorkay and H. Baba and M. Csatl{\'o}s and L. Csige and N. Fukuda and Zs F{\"u}l{\"o}p and Z. G{\'a}csi and J. Guly{\'a}s and N. Iwasa and H. Kinugawa and S. Kubono and M. Kurokawa and X. Liu and S. Michimasa and T. Minemura and T. Motobayashi and A. Ozawa and A. Saito and S. Shimoura and S. Takeuchi and I. Tanihata and P. Thirolf and Y. Yanagisawa and K. Yoshida",

note = "Funding Information: The authors would like to express their thanks to T. Otsuka for valuable discussion on nuclear structure and to J. Raynal for assisting during the coupled channel calculations. The ATOMKI group is grateful for the kind hospitality and support from RIKEN. This work was partly supported by OTKA T38404 and T42733. ",

year = "2004",

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doi = "10.1016/j.physletb.2004.02.022",

language = "English",

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T1 - Decoupling of valence neutrons from the core in 16C

AU - Elekes, Z.

AU - Dombrádi, Zs

AU - Krasznahorkay, A.

AU - Baba, H.

AU - Csatlós, M.

AU - Csige, L.

AU - Fukuda, N.

AU - Fülöp, Zs

AU - Gácsi, Z.

AU - Gulyás, J.

AU - Iwasa, N.

AU - Kinugawa, H.

AU - Kubono, S.

AU - Kurokawa, M.

AU - Liu, X.

AU - Michimasa, S.

AU - Minemura, T.

AU - Motobayashi, T.

AU - Ozawa, A.

AU - Saito, A.

AU - Shimoura, S.

AU - Takeuchi, S.

AU - Tanihata, I.

AU - Thirolf, P.

AU - Yanagisawa, Y.

AU - Yoshida, K.

N1 - Funding Information: The authors would like to express their thanks to T. Otsuka for valuable discussion on nuclear structure and to J. Raynal for assisting during the coupled channel calculations. The ATOMKI group is grateful for the kind hospitality and support from RIKEN. This work was partly supported by OTKA T38404 and T42733.

PY - 2004/4/22

Y1 - 2004/4/22

N2 - The neutron and proton excitations in 16C nucleus have been investigated by use of the Coulomb-nuclear interference method applied to the 208Pb+16C inelastic scattering. Angular distribution of the 16C nuclei in the inelastic channel populating the first 2 + state has been measured. The neutron and proton transition matrix elements, Mn and Mp, have been determined from the "Coulomb" and "matter" deformation-length parameters obtained by distorted wave calculations. The Mp or its corresponding B(E2;2+1→0+) value was found to be extremely small: 0.28±0.06 Weisskopf units consistent with a recent lifetime measurement. Furthermore, the extracted Mn/Mp ratio has an unexpectedly large value of 7.6±1.7. These results suggest that the 2+1 state in 16C is a nearly pure valence neutron excitation. copy; 2004 Published by Elsevier B.V.

AB - The neutron and proton excitations in 16C nucleus have been investigated by use of the Coulomb-nuclear interference method applied to the 208Pb+16C inelastic scattering. Angular distribution of the 16C nuclei in the inelastic channel populating the first 2 + state has been measured. The neutron and proton transition matrix elements, Mn and Mp, have been determined from the "Coulomb" and "matter" deformation-length parameters obtained by distorted wave calculations. The Mp or its corresponding B(E2;2+1→0+) value was found to be extremely small: 0.28±0.06 Weisskopf units consistent with a recent lifetime measurement. Furthermore, the extracted Mn/Mp ratio has an unexpectedly large value of 7.6±1.7. These results suggest that the 2+1 state in 16C is a nearly pure valence neutron excitation. copy; 2004 Published by Elsevier B.V.

KW - 21.10.Gv

KW - 24.10.Eq

KW - 25.70.De

KW - 27.20.+n

KW - 29.30.Kv

KW - Angular distribution

KW - Coulomb excitation of C

KW - Distorted wave calculation

KW - Neutron and proton transition matrix elements

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U2 - 10.1016/j.physletb.2004.02.022

DO - 10.1016/j.physletb.2004.02.022

M3 - Article

AN - SCOPUS:12144290910

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VL - 586

SP - 34

EP - 40

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

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

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ER -