| Autor: |
G.G. Mkrtchian, M.I. Dayon, L.A. Genina, V.A. Kramarenko, L.A. Jirova, M.N. Khachaturian, A.O. Gasparian, A.S. Alexanian, F.F. Kayumov, A.D. Kamenski, G. L. Melkumov, G.K. Megrabian, R.N. Pikhtelev, V.A. Ivanov, T.L. Asatiani |
| Rok vydání: |
1978 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods. 148:251-256 |
| ISSN: |
0029-554X |
| DOI: |
10.1016/0029-554x(70)90174-6 |
| Popis: |
An experimental arrangement designed for the study of π 0 -photoproduction on the nuclei of helium gas at small momentum transfers (the kinetic energy of the recoil nuclei T α kim = 1–20 MeV) is described. The arrangement consists of a recoil nucleus detector which is a self-triggering helium spark chamber and a π 0 -meson detector which is a combination of total absorption Cherenkov spectrometers, wide gap spark chambers and scintillation counters. By this arrangement the reaction γ + 4 He→ 4 He+ π 0 has been investigated and for the energy interval E γ = 1.5–4.5 GeV a value of the cross section has been obtained integrated over the angular interval θ π 0 lab = 2°–8° equal to (0.28±0.02) μb (statistical errors). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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