Level lifetimes in the stable Zr nuclei: Effects of chemical properties in Doppler-shift measurements

B(E2)strength ratio of one-phonon2+states of94Zr from electron scattering at low momentum transf

“…The value is consistent with Ref. [9] and independently confirms the result of their reanalysis of the lifetime of the 2 + 2 state. The small uncertainty of the PWBA analysis (because of the cancellation of systematic errors in a relative measurement) can be used in future to improve the uncertainties of the absolute B(E2) values.…”

“…Because of the general implications of Ref. [9] on DSAM measurements an independent check of this result is desirable. Here, we report on a new measurement of the ratio of the B(E2) strengths from electron scattering.…”

“…The difference in the results has been related to the chemical properties of the scattering targets used in those experiments. It has been shown that the measured lifetimes differ for amorphous (Zr(OH) 4 ) and crystalline (ZrO 2 ) material and the effect depends on the particle size [9]. Shorter lifetimes have been observed for samples composed of smaller particles.…”

“…At the photon point indicated by the vertical dashed line, this observable equals the square root of the corresponding B(E2) transition strengths. Additionally, data points deduced from the ratio of B(E2) strengths obtained from γ-decay lifetime measurements are shown as blue full circle [4] and full triangle [9], respectively. The red solid curve is a fit of Eq.…”

Lifetime measurements of low-spin negative-parity levels in Gd160

“…Additional descriptions of the experimental setup and techniques are documented in Refs. [27][28][29].…”