Author/Authors :
Batarin، نويسنده , , V.A and Butler، نويسنده , , J. and Chen، نويسنده , , T.Y. and Davidenko، نويسنده , , A.M. and Derevschikov، نويسنده , , A.A. and Goncharenko، نويسنده , , Y.M and Grishin، نويسنده , , V.N and Kachanov، نويسنده , , V.A and Konstantinov، نويسنده , , A.S. and Kravtsov، نويسنده , , V.I. and Kormilitsin، نويسنده , , V.A. and Kubota، نويسنده , , Y. and Lukanin، نويسنده , , V.S. and Matulenko، نويسنده , , Y.A. and Melnick، نويسنده , , Y.M. and Meschanin، نويسنده , , A.P. and Mikhalin، نويسنده , , N.E. and Minaev، نويسنده , , N.G. and Mochalov، نويسنده , , V.V. and Morozov، نويسنده , , D.A. and Nogach، نويسنده , , L.V. and Ryazantsev، نويسنده , , A.V. and Semenov، نويسنده , , P.A. and Semenov، نويسنده , , V.K. and Shestermanov، نويسنده , , K.E. and Soloviev، نويسنده , , L.F. and Stone، نويسنده , , S. and Uzunian، نويسنده , , A.V. and Vasiliev، نويسنده , , A.N. and Yakutin، نويسنده , , A.E. and Yarba، نويسنده , , J.، نويسنده ,
Abstract :
We employed two independent methods to study possible damage to the scintillation mechanism in lead tungstate crystals due to irradiation by a 34 V pion beam. Firstly 10 crystals were irradiated simultaneously over 30 h by a narrow beam, so that only a small region of each crystal was affected. We studied the effect of the irradiation on the light output non-uniformity. If a localized degradation was observed, it would indicate damage to the scintillation mechanism. Secondly, we detected light output using two phototubes attached to the sides of a crystal. Since these phototubes detect scintillation light only from a small localized region, the effect of transmission loss should be minimal. We did not see any statistically significant evidence for scintillation mechanism damage with either method. The effect is consistent with zero, and the upper limit is 0.5% at 95% C.L.
