Journal article

Publication year: 1999

Pages: 83-89

Journal: The European Physical Journal A

Volume number: 6

Issue number: 1

ISSN: 1434-6001

DOI Link: https://doi.org/10.1007/s100500050320

Publisher: Springer

Abstract: 
Photoproduction of eta mesons from He-4 has been measured for the first time, The experiment was performed at the Mains Microtron (MAMI) using the TAPS photon spectrometer and the Glasgow/Mainz tagged photon facility, eta mesons were identified in coincidence with recoil nucleons. Total and differential cross sections are presented in the photon energy range between threshold and 818 MeV. The exclusive data are used to determine the ratio of the elementary production cross sections on bound neutrons and protons. sigma(n)/sigma(p) = 0.68 +/- 0.02 +/- 0.09. In addition, upper limits for the total coherent cross section have been derived.

Harvard Citation style: Hejny, V., Achenbach, P., Ahrens, J., Beck, R., Hall, S., Kotulla, M., et al. (1999) Near threshold photoproduction of η mesons from ⁴He, The European Physical Journal A, 6(1), pp. 83-89. https://doi.org/10.1007/s100500050320

APA Citation style: Hejny, V., Achenbach, P., Ahrens, J., Beck, R., Hall, S., Kotulla, M., Krusche, B., Kuhr, V., Leukel, R., Metag, V., Novotny, R., de León, V., Owens, R., Rambo, F., Schmidt, A., Schumacher, M., Siodlaczek, U., Ströher, H., Wissmann, F., ...Wolf, M. (1999). Near threshold photoproduction of η mesons from ⁴He. The European Physical Journal A. 6(1), 83-89. https://doi.org/10.1007/s100500050320