| Autor: |
Angus, Cameron, Williams, Matthew, Andreyev, Andrei, Bhattacharjee, Soumendu, Buck, Samantha, Chakraborty, Soham, Davids, Barry, Diget, Christian, Garnsworthy, Adam, Griffin, Chris, Fernandez, Asunción, Hackman, Greg, Hudson, Kevan, Hufschmidt, Dirk, Karayonchev, Vasil, Kim, Yong, Laird, Alison, Lennarz, Annika, Mashtakov, Konstantin, Machule, Peter |
| Předmět: |
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| Zdroj: |
EPJ Web of Conferences; 3/22/2023, Vol. 279, p1-5, 5p |
| Abstrakt: |
The r-process has been shown to be robust in reproducing the abundance distributions of heavy elements, such as europium, seen in ultra-metal poor stars. In contrast, observations of elements 26 < Z < 47 display overabundances relative to r-process model predictions. A proposed additional source of early nucleosynthesis is the weak r-process in neutrino-driven winds of core-collapse supernovae. It has been shown that in this site (α,n) reactions are both crucial to nucleosynthesis and the main source of uncertainty in model-based abundance predictions. Aiming to improve the certainty of nucleosynthesis predictions, the cross section of the important reaction 86Kr(α,n)89Sr has been measured at an energy relevant to the weak r-process. This experiment was conducted in inverse kinematics at TRIUMF with the EMMA recoil mass spectrometer and the TIGRESS gamma-ray spectrometer. A novel type of solid helium target was used. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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