Direct proton decay of the isoscalar giant dipole resonance

M. Hunyadi, A. M. Van Den Berg, N. Blasi, C. Bäumer, M. Csatlós, L. Csige, B. Davids, U. Garg, J. Gulyás, M. N. Harakeh, M. A. De Huu, B. C. Junk, A. Krasznahorkay, S. Rakers, D. Sohler, H. J. Wörtche

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Abstract

The direct proton decay of the isoscalar giant dipole resonance (ISGDR) has been studied in 208Pb using the (α, α′ p) reaction at a bombarding energy of 200 MeV. Through observation of direct-decay protons from the ISGDR in coincidence with scattered α-particles, the population of proton-hole states in 207T1 was studied, allowing us to test recently performed continuum-RPA (CRPA) calculations for the ISGDR and thereby to learn about its microscopic structure. The energy and width of the ISGDR were also determined to be 22.1 ± 0.3 MeV and 3.8 ± 0.8 MeV, respectively. A new resonance of quadrupole character was observed at E x = 26.9 ± 0.7 MeV with a width of 6.0 ± 1.3 MeV.

Original languageEnglish
Pages (from-to)253-259
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume576
Issue number3-4
DOIs
Publication statusPublished - Dec 11 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Hunyadi, M., Van Den Berg, A. M., Blasi, N., Bäumer, C., Csatlós, M., Csige, L., Davids, B., Garg, U., Gulyás, J., Harakeh, M. N., De Huu, M. A., Junk, B. C., Krasznahorkay, A., Rakers, S., Sohler, D., & Wörtche, H. J. (2003). Direct proton decay of the isoscalar giant dipole resonance. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 576(3-4), 253-259. https://doi.org/10.1016/j.physletb.2003.10.016