GROUP MEETING

GN11-17

December 7, 2011

 

To:

LaJohn

 

There will be a group meeting FRIDAY December 9, 3:30 pm (NOTE!!)  Room 221B AH.

 

(Dec 23?, Jan 13, Feb 5, 17, Mar 9, 30, Apr 20, May 4, 26, Jun 16 )

 

1

Organizational Issues

a

Appointments, next meeting, other meetings, lectures

 

 

b

Computer issues, finances,

 

2

Meetings

Place

Date

 

 

 

 

 

AAAS

Vancouver, BC

Feb 17-21

 

DAMOP

Orange County, CA

June 4-8

 

CAARI

Fort Worth

Aug 5-10

 

ISRP

Rio de Janeiro

Oct 8-12

 

3

Deadlines

 

 

 

 

 

Abstracts

DAMOP (Jan 27)

 

Manuscripts

 

 

Registration

 

 

4

Travels, Visitors

 

 

 

 

Travel

 

 

Arrivals

 

 

Departures

 

 

Visits

Sen Gupta (?), Avdonina (Dec 30- Jan 8), Surzhykov ( ?).

 

 

RHP

Pitt

DC

Travel

 

 

 

 

 

 

 

 

Dec

9-11

-8

 

 

 

 

22-J3

12-21

 

 

 

Jan

13-17

4-12

 

 

 

 

 

18- F2

 

 

 

Feb

3-5

6-16

 

 

 

 

17-20

21-M8

 

 

 

Mar

8-11

12-22?

 

Heidelberg??

 

 

30-A1

26?-29

c23?-25?

Denver?

 

April

20-23

2-19

 

Bucharest??

 

 

 

24-M3

 

 

 

May

4-6?

?7-19

c 6-9?

New York?

 

 

25-28

21-24

20

Frederick, MD

 

 

 

29-J3

 

 

 

June

15-17

9-14

4-8

Orange Cnty CA

 

 

 

18-

c23

Prague

 

July

 

 

 

 

 

Aug

 

 

 

 

 

Sept

 

 

 

India??

 

Oct

 

 

6-12

Rio de Janeiro

 

5

Manuscripts

 

 

 

 

563

"The Beginnings of ITAMP - Proposals from the AMO Community and the NSF Response",  R. H. Pratt, Proceedings of the Dalgarno Celebratory Symposium,  Imperial College Press (2010), 357-366.

 

564

"Compton scattering revisited", R. H. Pratt, L. A. LaJohn, V. Florescu, T. Suric, B. K. Chatterjee, S. C. Roy, Rad. Phys. Chem. 79, 124-131 (2010).

 

568

"Low-momentum-transfer nonrelativistic limit of the relativistic impulse approximatiom expression for Compton doubly differential cross sections and characterization of their relativistic contributions", L. A. LaJohn,  Phys. Rev. A 81, 043404 (2010).

 

569

"Quadrupole matrix element zeros and their effect on photoelectron angular distributions", L. A. LaJohn, S. T. Manson, R. H. Pratt, Nucl Inst Mthd A,  619, 7-9 (2010).

 

570

"Compton scattering from positronium and validity of impulse approximation", Z. Kalliman, K. Pisk, R. H. Pratt, published Phys Rev A 83, 053405 (2011).

 

571

"Cooper Minima: A Window on Nondipole Photoionization at Low Energy", G. B. Pradhan, J Jose, P. C. Deshmukh, L. A. La John, R. H. Pratt, and S. T. Manson,  published JPhysB 44, 201002 (2011).

 

6

Funding

 

 

 

 

Pittsburgh Proposals

 

 

 

 

Pittsburgh Awards

 

 

 

 

 

 

Other Awards

 

 

 

 

Due Dates

 

 

 

7

Recent Preprints

 

 

 

 

 

8

Recent Papers

 

 

 

 

 

a

LaJohn

‘angular distribution of thick-target bremsstrahlung produced by electrons with initial energies ranging from 10 to 20 kev incident on Ag”, Gonzales, Cavness, Williams, pRA 84, 052726 (2011)

 

b

LaJohn

“Free-free matrix elements for a many electron atom”, Novikov & Hopersky, JPB 44, 235001 (2011)

 

9

Review of Literature:

 

 

 

 

 

 

a

Pratt

"A comparison of the hydrogenlike dipole radial matrix elements with overlap integrals and a step toward explicit expressions of the multipole matrix elements", Blaive and Cadilhae, PPB 42, 165002 (2009).

 

b           

Pratt

"Absolute differential bremsstrahlung cross sections for 0.4 - 2 keV electrons scattered by Ar, Kr, Xe", Gnatchenko. Nechay, Tkachenko, PRA 80. 022707 (2009)

 

c

Pratt

"Unified ab initio treatment of attosecond  photoionization and Compton scattering", JPB 42, 205601 (09) Yudin et al

 

d

Pratt

“Double photoionization of helium including quadrupole radiation effects”, Ludlow et al, JPB 42, 225204 (09)

 

e

Pratt

“Two photon decay of excited levels in hydrogen: The ambiguity of the separation of cascades and pure two photon emission”, Labzowsky, Solovyev, Plunien, PRA 80, 062514 (09)

 

f

Pratt

“Angular correlations in the two-photon decay of helium-like heavy    elements”, Surzyhkov et al, PRA 81, 042510 (2010)

 

g

Pratt

“Impact of sharp screening on the Coulomb scattering problem in three dimensions”, Yakovkev et al, JPA 43, 245302 (2010)

 

h

Pratt

“Target effects on the linear polarization of photons emitted in radiative electron capture by heavy ions”, Artemyev, Surzhykov et al, PRA 82, 022716 (2010)

 

i

Pratt

“Two-photon decays of highly excited states in hydrogen’, Solovov et al, JPB 43, 175001 (20100

 

j

Pratt

“Electron-atom bremsstrahlung: double-differential cross section and polarization correlations”, Yerokhin & Surzhykov, PRA 82, 062702 (2010)

 

k

Pratt

“Vortex kinematics of a continuum electron pair”, JPB 44, 011001 (2011)

 

l

Pratt

“Calculation of two-photon decay rate of hydrogen-like ions by using B-polynomials”, Amaro, Surzhykov et al, JPA 44, 245302 (2011)

 

m

Pratt

“Classification of resonance Regge trajectories and a modified Mulholland formula”, Sokolovski, Akhmatskaya, PLA 375, 3062 (2011)

 

n

Pratt

“Two-photon absorption of few-electron heavy ions”, Surzhykov et al, PRA 84, 022511 (2011)

 

o

LaJohn

“Calculating energy levels in terms of phase shifts”, Yu, Baym, Pethick, JPB 44, 195207 (2011)

 

p

Pratt

“Measurement of the Correlation between electron spin and photon linear Polarization in Atomic-field Bremsstrahlung’, Tashenov et al, PRL 107, 173201 (2011)

 

q

LaJohn

“Interference effects in bound-free pair production in relativistic collisions of nuclei with molecules”, Voitkiv & Najjari, PRA 84, 042708 (2011)

 

 

10

Presentations

 

 

 

 

 

11

Manuscripts in Preparation

 

 

 

 

a

"Polarization correlations for d,f states", Kim, Goldberg, Pratt

 

b

"Observables in quantum mechanics: creating spin polarization in the absence of spin orbit interactions", Young Soon Kim and R. H. Pratt

 

c

“Some notes on analytic continuation of the Coulomb dipole matrix element:, O. I. Obolensky and R. H. Pratt

 

d

“Singularities of the Dipole Matrix Element”, D. B. Uskov & R. H. Pratt

 

e

Regge ideas in bremsstrahlung”, D. B. Uskov & R. H. Pratt

 

f

"Survey of Compton ScatteringDoubly Differential Cross Sections: Future Direction", Chatterjee, Roy, LaJohn, for NIM

 

12

Work in Progress

 

 

 

 

Lajohn

quad 0's, Compton

 

13

Computer facilities

 

 

 

The group owns a number of computers, including PC Intel Pentium 4, (Stribor), Sun SPARCstation 5 (Oat), Pentium laptop computer (Shiba), PC Intel Celeron (OatPC), and R. Pratt’s PowerMac G4.

 

Stribor (operated by Linux Red Hat 9) serves as the main group computer.  All user files are stored on Stribor.  It has the latest version of Intel fortran compiler, and users are encouraged to compile, debug and run their codes using Stribor.

 

Stribor also runs the IMAP mail server and Apache web server. The group’s website address is http://stribor.phyast.pitt.edu

 

Old large codes (Rayleigh and Compton scattering, bremsstrahlung) can be run on Oat (operated by Solaris 2.6). Rayleigh & Compton have also been modified for compilation under the Windows operating system.  The latest version of these can be obtained from L. LaJohn. 

 

OatPC runs WindowsXP and has all commonly used applications.  Short term visitors who prefer Windows over Linux can use OatPC.

 

The group has books available on various operating systems, languages and software, also hardcopy documentation on the codes.