Level and decay scheme studies inZr92andZr

Investigation of low-spin states inZr92with the (n,n'γFransen1, Werner2, Bandyopadhyay3 et al. 2005Phys. Rev. CSelf Cite628571View full textAdd to dashboardCite

“…In Ref. [21], this mixing ratio was not measured unambiguously, but our result is close to one of the values, δ = 0.13 (9), determined in that work. The different sign results from the different phase conventions used in this work and in Ref.…”

“…A weak decay branch to the 4 + 1 state given in [19] was not identified in our spectra. For the E2/M1 mixing ratio of the 2 + 3 → 2 + 1 transition, we determined values of (7), which are consistent with the results of Glasgow et al [21]. We accept the first mixing ratio, because it is in agreement with the value from an (n,γ ) experiment of δ = −2.7 +0.8 −1.5 [19].…”

“…For J = 3 or 5, positive parity is required because for both those hypotheses the multipole mixing ratio of the decay to the 4 + 1 state would be nonzero, and the fast decay to the 4 + 1 state prohibits a strong M2 admixture. For the spin hypothesis J = 4, our data yielded a multipole mixing ratio of δ = −0.02 +0.04 −0.03 , which is consistent with the data from the earlier (n,n γ ) experiment [21] and allows negative parity. From the l = 3 + 5 transfer in a 91 Zr(d,p) 92 Zr experiment, spin and parity J π = (1 − − 4 − ) were assigned [32].…”

“…Experiments with the (n,n γ ) reaction on 92 Zr were performed by Glasgow and coworkers [21] in the late 1970s. The level scheme was investigated in these experiments up to an energy of about 3.5 MeV, and neutron scattering cross sections were determined.…”

The level structure of85Rb and87Rb from (n, n??) reaction measurements

“…Conventional long counters, positioned at 0 ~ 50 ~ and 90 ~ were used to monitor the neutron flux and to normalise runs to each other. The extraction of cross sections was achieved by comparison with runs performed under identical conditions using a zirconium sample and normalising to the well-established zirconium cross sections for the 919 keV and 934 keV gamma rays [25,26] as has been discussed previously [27]. For these determinations, the effects due to neutron flux attenuation, multiple scattering and gamma-ray absorption in the samples were corrected for using the method of Engelbrecht [28,29].…”