: measuring timẹ
4.Tap chi:VNU Joumal ofScience, Mathematics Physics (2008) dang in 5 Tom tat cong trinh bang tieng Viet:
5. Tom tat cong trinh bang tieng Viet:
Ti so tik dien cua trong phan ung quang hat nhan "^Ve(y,xnp)^^'^^Mn dugc kich
thich bang chiim buc xa ham nang lugng cue dai da dugc xac dinh b^ng thuc nghiem theo phuang phap kich hoat phong xạ Hoat do cua cac la Fe sau khi kich hoat da dugc cac djnh bang phuang phap pho ke gamma ban dan sieu tinh khiet gecmani HPGẹ De tai da \ae dinh ti so tiet dien izomer ciia phan irng "^^Fe(Y,xnp)^^'^'^Mn doi voi chum buc xa ham nang lugng cue dai 50 MeV, 60 MeV and 50 MeV. Ket qua eau cac ti so tiet dien dong phan tuang ixng la 0.27+0.03, 0.33±0.04 and 0.34±0.04. Ti so tiet dien dong phan ciia phan ung "^*Fe(Y,xnp)^^"^'^Mn vai chum biic xa ham nang lugng cue dai 70 MeV thu dugc phii hgp vai s6 lieu da x dugc cong bo tren the gioị Ti so tiet dien dong phan eiia phan irng "^^Fe(y,xnp)^^"^'^Mn voi chum buc xa ham nang lugng cue dai 50 MeV va 60MeV lan dau tien dugc dọ
6. Bang tieng Anh
Journal: VNU Journal of Science, Mathematics - Physics (2008) Number of Papers: 05
Summany in English:
The isomeric yield ratios for the "^'Fe(y,xnp)^^"'^Mn reaction induced by 50,60 and 70 MeV bremsstrahlung photons were determined using the activation and y-ray spectroscopic methods. The bremsstrahlung beams were provided from the test Pohang electron linac. The isomeric yield ratios were determined from the measured activities of the produced nuclei in irradiated foil samples. The y-ray activities were measured by with a calibrated high-purity germanium detector, HPGẹ Isomeric yield ratios for the reaction "''Fe(y,xnp)'^"''^Mn measured at 50,60and 70 MeV bremsstrahlung photons are 0.27±0.03, 0.3310.04 and 0.34±0.04. The present results measured at 50 and 60 MeV bremsstrahlung are the first time reported. So, our data contribute to fitl in the energy between 30 and 100 MeV.