Electric quadrupole excitation strengths of <SUP>112,116,120</SUP>Sn from nuclear resonance fluorescence
Creators
- 1. Tech Univ Darmstadt, Inst Nucl Phys, Dept Phys, D-64289 Darmstadt, Germany
- 2. Horia Hulubei Natl Inst R&D Phys & Nucl Engn IFIN, Extreme Light Infrastruct Nucl Phys ELI NP, Bucharest 077125, Romania
Description
Electric quadrupole ground-state excitation strengths B(E2) up arrow of the first 2(+) states of midshell Sn isotopes were measured with the nuclear resonance fluorescence method to investigate the systematic disagreement between available experimental data from different techniques. Also, model calculations show conflicting trends of B(E2; 0(1)(+) -> 2(1)(+)) values around Sn-116. Three experiments on Sn-112,Sn-116,Sn-120 were carried out at the superconducting Darmstadt linear accelerator with beams of bremsstrahlung. A consistent analysis including systematic effects for all experiments yields a decrease in excitation strength from B(E2) up arrow= 0.234(13) e(2)b(2) for Sn-112 to B(E2) up arrow= 0.195(13) e(2)b(2) for Sn-116, followed by a slight decline to B(E2) up arrow= 0.188(14) e(2)b(2) in Sn-120. Reduced collectivity around Sn-116, as measured with the Doppler-shift attenuation method and predicted by latest Monte Carlo shell model calculations, can thus not be confirmed by our results; whereas satisfactory agreement is found with available Coulomb excitation data.
Files
bib-a064e27b-6905-42b9-940d-b066aa4d28af.txt
Files
(409 Bytes)
| Name | Size | Download all |
|---|---|---|
|
md5:914f25c07845d27e7caaa8baf909a891
|
409 Bytes | Preview Download |