Author/Authors :
Kobayashi، نويسنده , , S. and Hasebe، نويسنده , , Mina N. and Igarashi، نويسنده , , T. and Kobayashi، نويسنده , , M.-N. and Miyachi، نويسنده , , T. and Miyajima، نويسنده , , M. and Okada، نويسنده , , H. and Okudaira، نويسنده , , O. and Tezuka، نويسنده , , C. and Yokoyama، نويسنده , , E. R. Doke، نويسنده , , T. and Shibamura، نويسنده , , Ross E. and Dmitrenko، نويسنده , , V.V. and Ulin، نويسنده , , S.E. and Vlasik، نويسنده , , K.F.، نويسنده ,
Abstract :
Scintillation and ionization yields in xenon gas for 5.49 MeV alpha-particles were measured in the range of pressure from 0.35 to 3.7 MPa and the electric field strength (E) over the number density of xenon atoms (N), E/N from 0 to 5×10−18 V cm2. When our data are normalized at the data point measured by Saito et al., the number of scintillation photons is 2.3×105 while the number of ionization electrons is 2.0×105 at 2.6 MPa and at 3.7×10−18 V cm2. The scintillation and ionization yields of xenon doped with 0.2% hydrogen, High-Pressure Xenon gas[H2-0.2%], at 2.6 MPa was also measured. Scintillation yield of the Xe–H2 mixture gas is 80% as high as that of pure xenon. It is found that the scintillation yield is luminous enough to generate a trigger pulse of the high-pressure xenon time projection chamber, which is expected as a promising MeV Compton gamma-ray camera.
