Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

D. Martin; P. Von Neumann-Cosel; A. Tamii; N. Aoi; S. Bassauer; C. A. Bertulani; J. Carter; L. Donaldson; H. Fujita; Y. Fujita; T. Hashimoto; K. Hatanaka; T. Ito; A. Krugmann; B. Liu; Y. Maeda; K. Miki; R. Neveling; N. Pietralla; I. Poltoratska; V. Yu Ponomarev; A. Richter; T. Shima; T. Yamamoto; M. Zweidinger

doi:10.1103/PhysRevLett.119.182503

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

D. Martin, P. Von Neumann-Cosel, A. Tamii, N. Aoi, S. Bassauer, C. A. Bertulani, J. Carter, L. Donaldson, H. Fujita, Y. Fujita, T. Hashimoto, K. Hatanaka, T. Ito, A. Krugmann, B. Liu, Y. Maeda, K. Miki, R. Neveling, N. Pietralla, I. PoltoratskaV. Yu Ponomarev, A. Richter, T. Shima, T. Yamamoto, M. Zweidinger

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

43 Citations (Scopus)

Abstract

The gamma strength function and level density of 1- states in Mo96 have been extracted from a high-resolution study of the (p→, p→′) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for Mo96 and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.

Original language	English
Article number	182503
Journal	Physical Review Letters
Volume	119
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.119.182503
Publication status	Published - 2017 Nov 2

Access to Document

10.1103/PhysRevLett.119.182503

Cite this

Martin, D., Von Neumann-Cosel, P., Tamii, A., Aoi, N., Bassauer, S., Bertulani, C. A., Carter, J., Donaldson, L., Fujita, H., Fujita, Y., Hashimoto, T., Hatanaka, K., Ito, T., Krugmann, A., Liu, B., Maeda, Y., Miki, K., Neveling, R., Pietralla, N., ... Zweidinger, M. (2017). Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance. Physical Review Letters, 119(18), Article 182503. https://doi.org/10.1103/PhysRevLett.119.182503

@article{12945778d2ce4573aed230b7bd87fa3e,

title = "Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance",

abstract = "The gamma strength function and level density of 1- states in Mo96 have been extracted from a high-resolution study of the (p→, p→′) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for Mo96 and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.",

author = "D. Martin and {Von Neumann-Cosel}, P. and A. Tamii and N. Aoi and S. Bassauer and Bertulani, {C. A.} and J. Carter and L. Donaldson and H. Fujita and Y. Fujita and T. Hashimoto and K. Hatanaka and T. Ito and A. Krugmann and B. Liu and Y. Maeda and K. Miki and R. Neveling and N. Pietralla and I. Poltoratska and Ponomarev, {V. Yu} and A. Richter and T. Shima and T. Yamamoto and M. Zweidinger",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = nov,

day = "2",

doi = "10.1103/PhysRevLett.119.182503",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

}

Martin, D, Von Neumann-Cosel, P, Tamii, A, Aoi, N, Bassauer, S, Bertulani, CA, Carter, J, Donaldson, L, Fujita, H, Fujita, Y, Hashimoto, T, Hatanaka, K, Ito, T, Krugmann, A, Liu, B, Maeda, Y , Miki, K, Neveling, R, Pietralla, N, Poltoratska, I, Ponomarev, VY, Richter, A, Shima, T, Yamamoto, T & Zweidinger, M 2017, 'Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance', Physical Review Letters, vol. 119, no. 18, 182503. https://doi.org/10.1103/PhysRevLett.119.182503

TY - JOUR

T1 - Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

AU - Martin, D.

AU - Von Neumann-Cosel, P.

AU - Tamii, A.

AU - Aoi, N.

AU - Bassauer, S.

AU - Bertulani, C. A.

AU - Carter, J.

AU - Donaldson, L.

AU - Fujita, H.

AU - Fujita, Y.

AU - Hashimoto, T.

AU - Hatanaka, K.

AU - Ito, T.

AU - Krugmann, A.

AU - Liu, B.

AU - Maeda, Y.

AU - Miki, K.

AU - Neveling, R.

AU - Pietralla, N.

AU - Poltoratska, I.

AU - Ponomarev, V. Yu

AU - Richter, A.

AU - Shima, T.

AU - Yamamoto, T.

AU - Zweidinger, M.

PY - 2017/11/2

Y1 - 2017/11/2

N2 - The gamma strength function and level density of 1- states in Mo96 have been extracted from a high-resolution study of the (p→, p→′) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for Mo96 and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.

AB - The gamma strength function and level density of 1- states in Mo96 have been extracted from a high-resolution study of the (p→, p→′) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for Mo96 and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.

UR - http://www.scopus.com/inward/record.url?scp=85032723482&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85032723482&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.119.182503

DO - 10.1103/PhysRevLett.119.182503

M3 - Article

C2 - 29219585

AN - SCOPUS:85032723482

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 182503

ER -

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

Abstract

Access to Document

Other files and links

Fingerprint

Cite this