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NUCLEAR RECOIL AND DETECTION OF THE NEUTRINO

O. KOFOED-HANSEN
Physica
Dec 1 1952
Comment(s): 

Review of early recoil experiments says Allen He6 result is “tentative”

Excerpt(s): 

The 6He experiment suffers from poor geometry but improvements are being made both in Urbana, in Columbia, and in the Cavendish laboratory. Furthermore, it should also be noted that" the charge of the recoils is not necessarily unity but may vary widely. Thus recoil measurements should be performed by methods where this charge does not enter.

INTRODUCTION

KAI SIEGBAHN
ALPHA-, BETA- AND GAMMA-RAY SPECTROSCOPY
Jan 1 1968
Comment(s): 

Excellent summary and context of issue from 10 years’ distance
Book includes Koefoed 1955 article that I don’t have

Excerpt(s): 

The transition probabilities in /?-decay are governed by selection rules and can be determined experimentally by measuring the partial half-lives of the different branches of the decay. This can be accomplished by means of the so-called Fermi analysis. One can then calculate the//-values of the transitions, / being the partial half-life and / a function of the transition energy and the atomic charge. The//-value is proportional to the inverse square of the nuclear matrix element. The //-values of various ^-transitions can be grouped into different classes.

The Neutrino

C. S. Wu
Jan 1 1960
Comment(s): 

Chapter in Wolfgang Pauli memorial volume edited by Fierz and Weisskopf

Excerpt(s): 

The linear combination of S and T was strongly favored before May 1957, as concluded from Table II. This dominating (S,T) combination was not questioned or challenged until the results of A35 were reported in May 1957. Now, the conclusion about the beta interactions based on recoil results is predominantly (V,A) combination. The cause and the unjustified assumptions which led to the erroneous conclusion of T for He6 were examined and analyzed in a report by Wu and Schwarzschild.

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