Decay pattern of pygmy states observed in neutron-rich Ne26

J. Gibelin; D. Beaumel; T. Motobayashi; Y. Blumenfeld; N. Aoi; H. Baba; Z. Elekes; S. Fortier; N. Frascaria; N. Fukuda; T. Gomi; K. Ishikawa; Y. Kondo; T. Kubo; V. Lima; T. Nakamura; A. Saito; Y. Satou; J. A. Scarpaci; E. Takeshita; S. Takeuchi; T. Teranishi; Y. Togano; A. M. Vinodkumar; Y. Yanagisawa; K. Yoshida

doi:10.1103/PhysRevLett.101.212503

Decay pattern of pygmy states observed in neutron-rich Ne26

J. Gibelin, D. Beaumel, T. Motobayashi, Y. Blumenfeld, N. Aoi, H. Baba, Z. Elekes, S. Fortier, N. Frascaria, N. Fukuda, T. Gomi, K. Ishikawa, Y. Kondo, T. Kubo, V. Lima, T. Nakamura, A. Saito, Y. Satou, J. A. Scarpaci, E. TakeshitaS. Takeuchi, T. Teranishi, Y. Togano, A. M. Vinodkumar, Y. Yanagisawa, K. Yoshida

Experimental Particle Physics

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

49 Citations (Scopus)

Abstract

Coulomb excitation of the exotic neutron-rich nucleus Ne26 on a Pb208 target was measured at 58MeV/u in order to search for low-lying E1 strength above the neutron emission threshold. This radioactive beam experiment was carried out at the RIKEN Accelerator Research Facility. Using the invariant mass method in the Ne25+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross section, a reduced dipole transition probability of B(E1)=0.49±0.16e2fm2 is deduced, corresponding to 4.9±1.6% of the Thomas-Reiche-Kuhn sum rule. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured. The extracted decay pattern is not consistent with several mean-field theory descriptions of the pygmy states.

Original language	English
Article number	212503
Journal	Physical review letters
Volume	101
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.101.212503
Publication status	Published - Nov 19 2008

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.101.212503

Cite this

Gibelin, J., Beaumel, D., Motobayashi, T., Blumenfeld, Y., Aoi, N., Baba, H., Elekes, Z., Fortier, S., Frascaria, N., Fukuda, N., Gomi, T., Ishikawa, K., Kondo, Y., Kubo, T., Lima, V., Nakamura, T., Saito, A., Satou, Y., Scarpaci, J. A., ... Yoshida, K. (2008). Decay pattern of pygmy states observed in neutron-rich Ne26. Physical review letters, 101(21), Article 212503. https://doi.org/10.1103/PhysRevLett.101.212503

Gibelin, J, Beaumel, D, Motobayashi, T, Blumenfeld, Y, Aoi, N, Baba, H, Elekes, Z, Fortier, S, Frascaria, N, Fukuda, N, Gomi, T, Ishikawa, K, Kondo, Y, Kubo, T, Lima, V, Nakamura, T, Saito, A, Satou, Y, Scarpaci, JA, Takeshita, E, Takeuchi, S, Teranishi, T, Togano, Y, Vinodkumar, AM, Yanagisawa, Y & Yoshida, K 2008, 'Decay pattern of pygmy states observed in neutron-rich Ne26', Physical review letters, vol. 101, no. 21, 212503. https://doi.org/10.1103/PhysRevLett.101.212503

@article{73a6031c2d1040fd9273ebee04d3492b,

title = "Decay pattern of pygmy states observed in neutron-rich Ne26",

abstract = "Coulomb excitation of the exotic neutron-rich nucleus Ne26 on a Pb208 target was measured at 58MeV/u in order to search for low-lying E1 strength above the neutron emission threshold. This radioactive beam experiment was carried out at the RIKEN Accelerator Research Facility. Using the invariant mass method in the Ne25+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross section, a reduced dipole transition probability of B(E1)=0.49±0.16e2fm2 is deduced, corresponding to 4.9±1.6% of the Thomas-Reiche-Kuhn sum rule. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured. The extracted decay pattern is not consistent with several mean-field theory descriptions of the pygmy states.",

author = "J. Gibelin and D. Beaumel and T. Motobayashi and Y. Blumenfeld and N. Aoi and H. Baba and Z. Elekes and S. Fortier and N. Frascaria and N. Fukuda and T. Gomi and K. Ishikawa and Y. Kondo and T. Kubo and V. Lima and T. Nakamura and A. Saito and Y. Satou and Scarpaci, {J. A.} and E. Takeshita and S. Takeuchi and T. Teranishi and Y. Togano and Vinodkumar, {A. M.} and Y. Yanagisawa and K. Yoshida",

year = "2008",

month = nov,

day = "19",

doi = "10.1103/PhysRevLett.101.212503",

language = "English",

volume = "101",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

TY - JOUR

T1 - Decay pattern of pygmy states observed in neutron-rich Ne26

AU - Gibelin, J.

AU - Beaumel, D.

AU - Motobayashi, T.

AU - Blumenfeld, Y.

AU - Aoi, N.

AU - Baba, H.

AU - Elekes, Z.

AU - Fortier, S.

AU - Frascaria, N.

AU - Fukuda, N.

AU - Gomi, T.

AU - Ishikawa, K.

AU - Kondo, Y.

AU - Kubo, T.

AU - Lima, V.

AU - Nakamura, T.

AU - Saito, A.

AU - Satou, Y.

AU - Scarpaci, J. A.

AU - Takeshita, E.

AU - Takeuchi, S.

AU - Teranishi, T.

AU - Togano, Y.

AU - Vinodkumar, A. M.

AU - Yanagisawa, Y.

AU - Yoshida, K.

PY - 2008/11/19

Y1 - 2008/11/19

N2 - Coulomb excitation of the exotic neutron-rich nucleus Ne26 on a Pb208 target was measured at 58MeV/u in order to search for low-lying E1 strength above the neutron emission threshold. This radioactive beam experiment was carried out at the RIKEN Accelerator Research Facility. Using the invariant mass method in the Ne25+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross section, a reduced dipole transition probability of B(E1)=0.49±0.16e2fm2 is deduced, corresponding to 4.9±1.6% of the Thomas-Reiche-Kuhn sum rule. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured. The extracted decay pattern is not consistent with several mean-field theory descriptions of the pygmy states.

AB - Coulomb excitation of the exotic neutron-rich nucleus Ne26 on a Pb208 target was measured at 58MeV/u in order to search for low-lying E1 strength above the neutron emission threshold. This radioactive beam experiment was carried out at the RIKEN Accelerator Research Facility. Using the invariant mass method in the Ne25+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross section, a reduced dipole transition probability of B(E1)=0.49±0.16e2fm2 is deduced, corresponding to 4.9±1.6% of the Thomas-Reiche-Kuhn sum rule. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured. The extracted decay pattern is not consistent with several mean-field theory descriptions of the pygmy states.

UR - http://www.scopus.com/inward/record.url?scp=56849084082&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56849084082&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.101.212503

DO - 10.1103/PhysRevLett.101.212503

M3 - Article

AN - SCOPUS:56849084082

SN - 0031-9007

VL - 101

JO - Physical review letters

JF - Physical review letters

IS - 21

M1 - 212503

ER -

Decay pattern of pygmy states observed in neutron-rich Ne26

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this