1 Probing mean field theory in the nuclear interior Bernard Frois CEA-DRT

1

Probing mean field theory inthe nuclear interior

              Bernard Frois

[email protected]

2

Celebrating Daniel Gogny

3

A great friend

• Working with him and his group was a pleasure.

• We achieved a lot together.

• Great sense of humor. « Bon vivant »

• Very French, wonderful smile, cheerful.

• A sense of elegance and style

• An impressive smoker

4

A great physicist

• Very sharp. World Class.

• Superb knowledge in Physics and Maths.

• Original, profound, intense in his work, perfectionist

• Liked to work at the blackboard

• A constellation of collaborators

• An artist …

5

1950’s

Robert Hofstadter Nobel Prize in Electron scattering

1974Visitor at CEA –Saclay

6

This figure gives a summary of the approximate charge density distributions found for various nuclei studied by electron scattering at Stanford University (R. Hofstadter)

7

1960 – 1970

Bethe, Bruckner, Goldstone

Significant disagreement with experimental properties

of nuclear matter

1970: Orsay group plays a leading role in the new generation HF calculations and Vnn

Hans Bethe, Nobel Laureate

Marcel Veneroni « Le Maître » plays a central role.

8

Is the shell model valid in the nuclear interior ?

Maria Goeppert-Mayer

9

1975 – 1985« Teaming Up »

A wealth of high momentum electron scattering data measured at CEA-Saclay

A powerful interaction between Saclay and Bruyères

le Châtel groups

10

Daniel Gogny develops his finite range force with his group and his HFB calculations in the 70’s

Daniel Gogny got the Prix Joliot-Curie in 1986

11

1977High momentum electron at CEA-Saclay allowed for the first time to probe the fine details of the nucleus

Note that this is a classic interference experiment.Electrons one by one follow the interference pattern.Each electron wave interfers with itself.

12

13

3s ?

3s

14

Correlations deplete the valence orbit

15

No problem in the nuclear interior.

Pauli principle blocks the strong NN interaction at short distances.

A problem of correlations at the fermi surface

This body of work has provided firm benchmarks against which to test our understanding of the nuclear many-body

problems

17

INPC98The young generation is ready