Elsevier

Physics Letters B

Volume 59, Issue 5, 8 December 1975, Pages 441-443
Physics Letters B

Isospin-forbidden electroexcitation of the 1, T = 0 state at 7.12 MeV in 16O at low momentum transfers

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Abstract

The isospin-forbidden electroexcitation of the 1, T = 0 state at 7.12 MeV in 16O has been studied for momentum transfers q = 0.22 − 0.49 fm−1. The form factor at these momentum transfers is determined by the sum of the isospin T = 0 part and a T = 1 contribution. A single particle-hole harmonic oscillator shell model calculation reproduces the q-dependence of the measured form factor which shows that the isovector contribution interferes destructively with the isoscalar part and has a strength of about 2% of the T = 0 amplitude.

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Work supported by Deutsche Forschungsgemeinschaft.

In partial fulfilment for the requirement of the Dr. rer. nat. degree.

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