Almost medium-free measurement of the Hoyle state direct-decay component with a TPC
نویسندگان
چکیده
منابع مشابه
New Measurement of the Direct 3α Decay from the ^{12}C Hoyle State.
Excited states in certain atomic nuclei possess an unusual structure, where the dominant degrees of freedom are those of α clusters rather than individual nucleons. It has been proposed that the diffuse 3α system of the ^{12}C Hoyle state may behave like a Bose-Einstein condensate, where the α clusters maintain their bosonic identities. By measuring the decay of the Hoyle state into three α par...
متن کاملImproved limit on direct α decay of the Hoyle state.
The current evaluation of the triple-α reaction rate assumes that the α decay of the 7.65 MeV, 0+ state in 12C, commonly known as the Hoyle state, proceeds sequentially via the ground state of 8Be. This assumption is challenged by the recent identification of two direct α-decay branches with a combined branching ratio of 17(5)%. If correct, this would imply a corresponding reduction in the trip...
متن کاملBondi-hoyle Accretion in a Turbulent Medium
The Bondi-Hoyle formula gives the approximate accretion rate onto a point particle accreting from a uniform medium. However, in many situations accretion onto point particles occurs from media that are turbulent rather than uniform. In this paper, we give an approximate solution to the problem of a point particle accreting from an ambient medium of supersonically turbulent gas. Accretion in suc...
متن کاملHigh-Precision Probe of the Fully Sequential Decay Width of the Hoyle State in ^{12}C.
The decay path of the Hoyle state in ^{12}C (E_{x}=7.654 MeV) has been studied with the ^{14}N(d,α_{2})^{12}C(7.654) reaction induced at 10.5 MeV. High resolution invariant mass spectroscopy techniques have allowed us to unambiguously disentangle direct and sequential decays of the state passing through the ground state of ^{8}Be. Thanks to the almost total absence of background and the attain...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2020
ISSN: 2469-9985,2469-9993
DOI: 10.1103/physrevc.102.041303