Decay modes of the giant resonance region in 40Ca

A. Moalem; W. Benenson; G. M. Crawley; T. L. Khoo

doi:10.1016/0370-2693(76)90617-1

Decay modes of the giant resonance region in ⁴⁰Ca

A. Moalem, W. Benenson, G. M. Crawley, T. L. Khoo

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Abstract

The reactions ⁴⁰Ca(τ, τ′α)³⁶Ar and ⁴⁰Ca(τ, τ′p)³⁹K were used to study the decay properties of the giant resonance region of ⁴⁰Ca at E_τ ≈ 70 MeV. Both processes are found to proceed via two intermediate distinct resonances at excitation energies E_x = 14.5 MeV and 18.0 MeV in ⁴⁰MeV resonances isoscalar giant quadropole resonance, is found to decay strongly by α-particle and proton emission with an observed ratio of Γ_p/Γ_α r{fish-hook} 1.0±0.2. Only a small fraction of the total observed decay strength (≈ 13% for the α-particle mode and ≈9% for the p mode) is due to ground-state transitions.

Original language	English
Pages (from-to)	167-170
Number of pages	4
Journal	Physics Letters B
Volume	61
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(76)90617-1
State	Published - 15 Mar 1976
Externally published	Yes

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Nuclear and High Energy Physics

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@article{08d6f3ef3ab7414987dc98c5f5e548b5,

title = "Decay modes of the giant resonance region in 40Ca",

abstract = "The reactions 40Ca(τ, τ′α)36Ar and 40Ca(τ, τ′p)39K were used to study the decay properties of the giant resonance region of 40Ca at Eτ ≈ 70 MeV. Both processes are found to proceed via two intermediate distinct resonances at excitation energies Ex = 14.5 MeV and 18.0 MeV in 40MeV resonances isoscalar giant quadropole resonance, is found to decay strongly by α-particle and proton emission with an observed ratio of Γp/Γα r{fish-hook} 1.0±0.2. Only a small fraction of the total observed decay strength (≈ 13% for the α-particle mode and ≈9% for the p mode) is due to ground-state transitions.",

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year = "1976",

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T1 - Decay modes of the giant resonance region in 40Ca

AU - Moalem, A.

AU - Benenson, W.

AU - Crawley, G. M.

AU - Khoo, T. L.

PY - 1976/3/15

Y1 - 1976/3/15

N2 - The reactions 40Ca(τ, τ′α)36Ar and 40Ca(τ, τ′p)39K were used to study the decay properties of the giant resonance region of 40Ca at Eτ ≈ 70 MeV. Both processes are found to proceed via two intermediate distinct resonances at excitation energies Ex = 14.5 MeV and 18.0 MeV in 40MeV resonances isoscalar giant quadropole resonance, is found to decay strongly by α-particle and proton emission with an observed ratio of Γp/Γα r{fish-hook} 1.0±0.2. Only a small fraction of the total observed decay strength (≈ 13% for the α-particle mode and ≈9% for the p mode) is due to ground-state transitions.

AB - The reactions 40Ca(τ, τ′α)36Ar and 40Ca(τ, τ′p)39K were used to study the decay properties of the giant resonance region of 40Ca at Eτ ≈ 70 MeV. Both processes are found to proceed via two intermediate distinct resonances at excitation energies Ex = 14.5 MeV and 18.0 MeV in 40MeV resonances isoscalar giant quadropole resonance, is found to decay strongly by α-particle and proton emission with an observed ratio of Γp/Γα r{fish-hook} 1.0±0.2. Only a small fraction of the total observed decay strength (≈ 13% for the α-particle mode and ≈9% for the p mode) is due to ground-state transitions.

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DO - 10.1016/0370-2693(76)90617-1

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VL - 61

SP - 167

EP - 170

JO - Physics Letters B

JF - Physics Letters B

IS - 2

ER -

Decay modes of the giant resonance region in ⁴⁰Ca

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