Deeply bound [Formula Presented] states in [Formula Presented] formed in the [Formula Presented] reaction. I. Experimental method and results

H. Gilg, A. Gillitzer, M. Knülle, M. Münch, W. Schott, P. Kienle, K. Itahashi, K. Oyama, R. S. Hayano, H. Geissel, N. Iwasa, G. Münzenberg, T. Yamazaki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The deeply bound pionic states [Formula Presented] were observed for the first time, by investigating the [Formula Presented] reaction at a beam energy of [Formula Presented] and at ejectile angles around 0°. The measured momentum distribution of the [Formula Presented] particles was used to determine the Q value spectrum in the region [Formula Presented] with a systematic uncertainty of ±120 keV and a full width at half maximum resolution of [Formula Presented] This spectrum shows a prominent peak at [Formula Presented] corresponding to the pionic [Formula Presented] state, coupled mainly to the [Formula Presented] and [Formula Presented] neutron hole states in [Formula Presented] A shoulder is seen on the tail of this dominant peak, and is attributed to the population of the pionic [Formula Presented] state. The cross section for the continuum component at these high excitation energies is [Formula Presented] The net cross section for production of [Formula Presented] states in the bound pion region [Formula Presented] above the continuum amounts to [Formula Presented].

Original languageEnglish
Pages (from-to)11
Number of pages1
JournalPhysical Review C - Nuclear Physics
Volume62
Issue number2
DOIs
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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