Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Poster Session
HK 27.3: Poster
Mittwoch, 18. März 2026, 16:15–18:30, Redoutensaal
Correction of the recoil attenuation in a plunger stopper foil — •Deniz Oyan, Volker Werner, Hannes Mayr, Clemens Nickel, Katharina Ide, and Norbert Pietralla — IKP, TU Darmstadt
Measurements applying the recoil-distance Doppler-shift method [1] at high recoil velocities of around 5 % v/c are prone to suffer from partially overlapping stop and flight components, due to the slowing-down process in the stopper. The Doppler-shifted γ-ray energy of the de-excitation is governed by the ion’s velocity distribution. Thus, the flight component cannot be distinguished from the Doppler tail of the (usually denoted "unshifted") component from ions having reached the stopper by simple Gaussian fits. To disentangle both components a simulation using the DSAM analysis software APCAD [2] is performed.
Accurate knowledge on lifetimes of excited states of 104, 106, 108Pd is necessary to precisely determine E2 transition strengths and g factors in this region of the nuclear chart. Therefore, our simulation is conducted on a dataset of the Pd isotopes from WNSL, Yale University [3]. This contribution presents the applicability of our method to correct for the attenuation in the stopper foil.
[1] A. Dewald et al., Prog. Part. Nucl. Phys. 67, 786-839 (2012)
[2] C. Stahl et al., Comput. Phys. Commun. 214, 174-198 (2017)
[3] V. Werner et al., J. Phys.: Conf. Ser. 366, 012048 (2012)
Keywords: RDDS; APCAD; g factor; Pd