Direct proton decay of the isoscalar giant dipole resonance in 208Pb

B. K. Nayak, U. Garg, M. Koss, T. Li, E. Martis, H. Fujimura, M. Fujiwara, K. Hara, K. Kawase, K. Nakanishi, E. Obayashi, H. P. Yoshida, M. Itoh, S. Kishi, H. Sakaguchi, H. Takeda, M. Uchida, Y. Yasuda, M. Yosoi, R. G T Zegers & 3 others H. Akimune, M. N. Harakeh, M. Hunyadi

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Abstract

The excitation and subsequent proton decay of the isoscalar giant dipole resonance (ISGDR) in 208Pb have been investigated via the 208Pb (α, α p) 207Tl reaction at 400 MeV. Excitation of the ISGDR has been identified by the difference-of-spectra method. The enhancement of the ISGDR strength at high excitation energies observed in the multipole-decomposition-analysis of the singles 208Pb (α, α) spectra is not present in the excitation energy spectrum obtained in coincidence measurement. The partial branching ratios for direct proton decay of ISGDR to low-lying states of 207Tl have been determined and the results are compared with predictions of continuum random-phase-approximation (CRPA) calculations.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalPhysics Letters B
Volume674
Issue number4-5
DOIs
Publication statusPublished - Apr 27 2009

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dipoles
protons
decay
excitation
multipoles
energy spectra
continuums
decomposition
augmentation
predictions
approximation
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Direct proton decay of the isoscalar giant dipole resonance in 208Pb. / Nayak, B. K.; Garg, U.; Koss, M.; Li, T.; Martis, E.; Fujimura, H.; Fujiwara, M.; Hara, K.; Kawase, K.; Nakanishi, K.; Obayashi, E.; Yoshida, H. P.; Itoh, M.; Kishi, S.; Sakaguchi, H.; Takeda, H.; Uchida, M.; Yasuda, Y.; Yosoi, M.; Zegers, R. G T; Akimune, H.; Harakeh, M. N.; Hunyadi, M.

In: Physics Letters B, Vol. 674, No. 4-5, 27.04.2009, p. 281-285.

Research output: Contribution to journalArticle

Nayak, BK, Garg, U, Koss, M, Li, T, Martis, E, Fujimura, H, Fujiwara, M, Hara, K, Kawase, K, Nakanishi, K, Obayashi, E, Yoshida, HP, Itoh, M, Kishi, S, Sakaguchi, H, Takeda, H, Uchida, M, Yasuda, Y, Yosoi, M, Zegers, RGT, Akimune, H, Harakeh, MN & Hunyadi, M 2009, 'Direct proton decay of the isoscalar giant dipole resonance in 208Pb', Physics Letters B, vol. 674, no. 4-5, pp. 281-285. https://doi.org/10.1016/j.physletb.2009.03.047
Nayak BK, Garg U, Koss M, Li T, Martis E, Fujimura H et al. Direct proton decay of the isoscalar giant dipole resonance in 208Pb. Physics Letters B. 2009 Apr 27;674(4-5):281-285. https://doi.org/10.1016/j.physletb.2009.03.047
Nayak, B. K. ; Garg, U. ; Koss, M. ; Li, T. ; Martis, E. ; Fujimura, H. ; Fujiwara, M. ; Hara, K. ; Kawase, K. ; Nakanishi, K. ; Obayashi, E. ; Yoshida, H. P. ; Itoh, M. ; Kishi, S. ; Sakaguchi, H. ; Takeda, H. ; Uchida, M. ; Yasuda, Y. ; Yosoi, M. ; Zegers, R. G T ; Akimune, H. ; Harakeh, M. N. ; Hunyadi, M. / Direct proton decay of the isoscalar giant dipole resonance in 208Pb. In: Physics Letters B. 2009 ; Vol. 674, No. 4-5. pp. 281-285.
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AU - Martis, E.

AU - Fujimura, H.

AU - Fujiwara, M.

AU - Hara, K.

AU - Kawase, K.

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AU - Itoh, M.

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AU - Takeda, H.

AU - Uchida, M.

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AU - Yosoi, M.

AU - Zegers, R. G T

AU - Akimune, H.

AU - Harakeh, M. N.

AU - Hunyadi, M.

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N2 - The excitation and subsequent proton decay of the isoscalar giant dipole resonance (ISGDR) in 208Pb have been investigated via the 208Pb (α, α′ p) 207Tl reaction at 400 MeV. Excitation of the ISGDR has been identified by the difference-of-spectra method. The enhancement of the ISGDR strength at high excitation energies observed in the multipole-decomposition-analysis of the singles 208Pb (α, α′) spectra is not present in the excitation energy spectrum obtained in coincidence measurement. The partial branching ratios for direct proton decay of ISGDR to low-lying states of 207Tl have been determined and the results are compared with predictions of continuum random-phase-approximation (CRPA) calculations.

AB - The excitation and subsequent proton decay of the isoscalar giant dipole resonance (ISGDR) in 208Pb have been investigated via the 208Pb (α, α′ p) 207Tl reaction at 400 MeV. Excitation of the ISGDR has been identified by the difference-of-spectra method. The enhancement of the ISGDR strength at high excitation energies observed in the multipole-decomposition-analysis of the singles 208Pb (α, α′) spectra is not present in the excitation energy spectrum obtained in coincidence measurement. The partial branching ratios for direct proton decay of ISGDR to low-lying states of 207Tl have been determined and the results are compared with predictions of continuum random-phase-approximation (CRPA) calculations.

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