Direct Measurement of the Formation Length of Photons | Zendy

K.K. Andersen | Zendy; Søren Lindholt Andersen | Zendy; J. Esberg | Zendy; H. Knudsen | Zendy; Rune E. Mikkelsen | Zendy; E. Uggerhøj | Zendy; P. Sona | Zendy; A. Mangiarotti | Zendy; T. J. Ketel | Zendy; S. Ballestrero | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Direct Measurement of the Formation Length of Photons

Author(s) -

K.K. Andersen,

Søren Lindholt Andersen,

J. Esberg,

H. Knudsen,

Rune E. Mikkelsen,

E. Uggerhøj,

P. Sona,

A. Mangiarotti,

T. J. Ketel,

S. Ballestrero

Publication year - 2012

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.108.071802

Subject(s) - physics , photon , electron , length scale , radiation , measure (data warehouse) , interference (communication) , position (finance) , atomic physics , computational physics , optics , nuclear physics , quantum mechanics , channel (broadcasting) , electrical engineering , finance , database , computer science , economics , engineering

We report the first observation of a shoulder in the radiation spectrum from GeV electrons in a structured target consisting of two thin and closely spaced foils. The position of the shoulder depends on the target spacing and is directly connected to the finite formation length of a low-energy photon emitted by an ultrarelativistic electron. With the present setup it is possible to control the separation of the foils on a μm scale and hence measure interference effects caused by the macroscopic dimensions of the formation length. Several theoretical groups have predicted this effect using different methods. Our observations have a preference for the modified theory by Blankenbecler but disagree with the results of Baier and Katkov

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research