LIFETIME MEASUREMENTS WITH THE DOPPLER SHIFT ATTENUATION METHOD USING A THICK HOMOGENEOUS PRODUCTION TARGET - VERIFICATION OF THE METHOD

Ertoprak, Ayşegül; Cederwall, B.; Jakobsson, U.; Nyako, B.; Nyberg, J.; Davies, P.; Doncel, M.; De France, G.; Kuti, I.; Napoli, D.; Wadsworth, R.; Ghugre, S.; Raut, R.; Akkus, Baki; Al-Azri, H.; Algora, A.; de Angelis, G.; Atac, A.; Back, T.; Boso, A.; Clement, E.; Debenham, D.; Dombradi, Zs.; Erturk, S.; Gadea, A.; Moradi, F.; Gottardo, A.; Huyuk, T.; Ideguchi, E.; Jaworski, G.; Li, H.; Michelagnoli, C.; Modamio, V.; Palacz, M.; Petrache, C.; Recchia, F.; Sandzelius, M.; Siciliano, M.; Timar, J.; Valiente-Dobon, J.; Xiao, Z.

doi:10.5506/aphyspolb.48.325

LIFETIME MEASUREMENTS WITH THE DOPPLER SHIFT ATTENUATION METHOD USING A THICK HOMOGENEOUS PRODUCTION TARGET - VERIFICATION OF THE METHOD

Atıf İçin Kopyala

Ertoprak A., Cederwall B., Jakobsson U., Nyako B. M., Nyberg J., Davies P., ...Daha Fazla

ACTA PHYSICA POLONICA B, cilt.48, sa.3, ss.325-329, 2017 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 48 Sayı: 3
Basım Tarihi: 2017
Doi Numarası: 10.5506/aphyspolb.48.325
Dergi Adı: ACTA PHYSICA POLONICA B
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.325-329
İstanbul Üniversitesi Adresli: Evet

Özet

Doppler Shift Attenuation Method (DSAM) analysis of excited-state lifetimes normally employs thin production targets mounted on a thick stopper foil ("backing") serving to slow down and stop the recoiling nuclei of interest in a well-defined manner. Use of a thick, homogeneous production target leads to a more complex analysis as it results in a substantial decrease in the energy of the incident projectile which traverses the target with an associated change in the production cross section of the residues as a function of penetration depth. Here, a DSAM lifetime analysis using a thick homogeneous target has been verified using the Doppler broadened lineshapes of gamma rays following the decay of highly excited states in the semi-magic (N = 50) nucleus Ru-94. Lifetimes of excited states in the Ru-94 nucleus have been obtained using a modified version of the LINESHAPE package from the Doppler broadened lineshapes resulting from the emission of the gamma rays, while the residual nuclei were slowing down in the thick (6 mg/cm(2)) metallic Ni-58 target. The results have been validated by comparison with a previous measurement using a different (RDDS) technique.