International Workshop on Fission Product Yields

Sep. 30 - Oct. 4, 2019
Santa Fe, New Mexico, USA

Contact the organizers

About the Fission Product Yield Workshop

We are organizing a workshop on fission product yields (FPY) with a particular focus on measurement, theory, evaluation, and applications. This will be a 4-day (9/30 - 10/3) open workshop in Santa Fe, followed by a one-day (10/4) closed session in Los Alamos. Detailed information including the exact locations will be announced in the second circular.

In 2010, M.B. Chadwick and T. Kawano organized a small workshop on the same topics in Santa Fe, which focused primarily on improvements needed in the ENDF/B FPY evaluation, summarizing experiments and evaluations performed at different institutes in the past. The past decade has seen a significant improvement in FPY data by progress in experimental techniques, theoretical model developments, and implementation of modern data evaluation methods. Strong demands for accurate FPY data exist not only in nuclear technology applications, but also in some fundamental science areas, for instance to accurately interpret the nuclear reactor anti-neutrino anomaly and understand the synthesis of the elements in nuclear astrophysics. The broad scope and diverse nature of this effort thus motivates us to bring together an international community for the improvement of FPY data evaluation.

The meeting will bring together key scientists in the fields of experiment, theory, evaluation and statistical analysis to exchange ideas, identify areas of cooperation, and to discuss plans for future release of evaluated nuclear data libraries. Please reply to to indicate your interest in coming to the workshop. Your email will be added to a list for future correspondence.

Get Started with registration!

Workshop Venue

Loretto Hotel Santa Fe, NM

211 Old Santa Fe Trail, Santa Fe, NM 87501
Reserve your hotel room online
If you prefer, hotel reservations can also be made over the phone by calling: 1-866-582-1646
When booking your room please use the group code ("190929INTE") or the short name ("International Workshop Fission Product")

Activities Near the Workshop

A rental car is recommended for visiting attractions

ABQ Balloon Fiesta

October 5 until October 13

New Mexican Cuisine

Red, green or Christmas?

Isotopes Baseball

Albuquerque's hometown team

Outdoor Adventures

Hike, bike or relax outdoors

Meow Wolf

Interactive art in Santa Fe

Santa Fe Railyard

Local art & food

Historic Tours

Enjoy the plaza or historic sites

Sky Watching

Draconids meteor shower

Workshop Dates & Registration

The registration fee is $200.00 USD which includes the (optional) conference dinner fee of $26.00 USD.
Please follow the link below to register for the workshop.
Register Online

Preliminary Workshop Agenda

Download PDF of the workshop agenda
Monday, September 30
Time Speaker Title
09:00 - 09:10 Local Organizing Committee General Introduction
09:10 - 10:40 Session: Experiments (I)
(Chair: Taieb)
09:10 - 9:40 K. Nishio
Measurement of fission fragment mass distributions of actinide nuclides using multi-nucleon transfer reactions
09:40 - 10:10 A. Chebboubi
Measurements of fission yields with the LOHENGRIN mass spectrometer at ILL
10:10 - 10:40 D. Duke
Measurements of Fission Product Yields for 233U(n,f), 234U(n,f), 237Np(n,f), and 239Pu(n,f) over a wide range of incident neutron energies
10:40 - 11:10 Break
11:10 - 12:10 Session: Experiments (II)
(Chair: Chebboubi)
11:10 - 11:40 J. Taieb
Progress in fission studies in reverse kinematics at relativistic energy: what happens next with the SOFIA experiment
11:40 - 12:10 A. Hecht
(U. New Mexico)
Developments in new measurements of fission cross-sections, fragment yields, and prompt and quasi-prompt gammas for nuclear data needs
12:10 - 14:00 Lunch
14:00 - 15:30 Session: Experiments (III)
(Chair: Nishio)
14:00 - 14:30 L. Gaudefroy
Production yields of micro-second isomers populated in 252Cf(SF) and perspective on the decay of fission fragments
14:30 - 15:00 S. Finc
Measurements of short-lived fission product yields at TUNL
15:00 - 15:30 S. Almarez-Calderon
(Florida State U.)
Fusion-induced fission measurements with the MUSIC active target detector
15:30 - 16:00 Break
16:00 - 17:00 Session: Experiments (IV)
(Chair: Gaudefroy)
16:00 - 16:30 M. Gooden
Toward short-lived and energy-dependent fission product yields from neutron- and photon-induced fission
16:30 - 17:00 B. Fulsom
Bragg curve spectroscopy for improved fission fragment identification
Tuesday, October 1
Time Speaker Title
09:00 - 10:30 Session: Experiments (V)
(Chair: Savard)
09:00 - 09:30 B. Pierson
Short-lived fission product yield measurements at the National Critical Experiments Research Center
09:30 - 10:00 T. Bredeweg
Fission product chain yield measurements at NCERC
10:00 - 10:30 I. May
The role of radiochemistry in preserving, and advancing fission product analysis at LANL
10:30 - 11:00 Break
11:00 - 12:30 Session: Experiments (VI)
(Chair: Pierson)
11:00 - 11:30 G. Savard
Fission product yield measurements using 252Cf spontaneous fission and neutron-induced fission on actinide targets at CARIBU
11:30 - 12:00 G. Rusev
Late prompt fission gamma rays from 235U(n,f) and 252Cf(sf)
12:00 - 12:30 J. Silano
Validating the Bohr hypothesis: comparing fission-product yields from photon-induced fission of 240Pu and neutron-induced fission of 239Pu
12:30 - 14:00 Lunch
14:00 - 15:20 Session: Experiments (VII) [20 min talks]
(Chair: Bredeweg)
14:00 - 14:20 V. Linero
Measurement of short-lived fission products of Pu-239
14:20 - 14:40 R. Stanescu
(U. Mass. Lowell)
Prompt fission gamma-ray measurements at UML research reactor
14:40 - 15:00 K. Kolos
Precision beta-decay branching ratio measurements for long-lived fission products
15:00 - 15:20 A. Tamashiro
(Oregon State U.)
New fission product yield measurements at Oregon State University
15:20 - 15:50 Break
15:50 - 16:20 Session: Database (I)
(Chair: Sonzogni)
15:50 - 16:20 B. Pritychenko
Present status of neutron-, photo-induced and spontaneous fission yields experimental data
16:20 - 16:50 S. Okumura
Completeness check of experimental fission product yield data in EXFOR database
19:00 - 21:00 Working Dinner
  J. Wilhelmy
Fifty years of fission – a personal perspective
Wednesday, October 2
Time Speaker Title
09:00 - 10:30 Session: Theory (I)
(Chair: Chiba)
09:00 - 09:30 N. Schunck
Microscopic calculations of fission fragment distributions
09:30 - 10:00 R. Vogt
Employing FREYA as a tool for fission product yield evaluations
10:00 - 10:30 P. Jaffke
Using CGMF to estimate corrections for fission yields measured via gamma-ray spectroscopy
10:30 - 11:00 Break
11:00 - 12:30 Session: Theory (II)
(Chair: Schunck)
11:00 - 11:30 S. Chiba
(Tokyo Tech.)
Correlated transitions in symmetric and dominant fission modes and multipole moments of fission fragments
11:30 - 12:00 M. Verriere
Description of the fission process: nuclear models for fission dynamics
12:00 - 12:30 I. Abdurrahman
(U. Washington)
Fission of 236U within a time-dependent extension of the density functional theory to superfluid systems
12:30 - 14:00 Lunch
14:00 - 15:30 Session: Applications (I)
(Chair: Mumpower)
14:00 - 14:30 R. Surman
(U. Notre Dame)
Fission and the origins of the heaviest element
14:30 - 15:00 T. Sprouse
(U. Notre Dame / LANL)
Following fission products in explosive astrophysical environments
15:00 - 15:30 N. Vassh
(U. Notre Dame)
Fission and lanthanide production in r-process nucleosynthesis
15:30 - 16:00 Break
16:00 - 17:00 Session: Applications (II) / Experiment (VIII)
(Chair: Jaffke)
16:00 - 16:30 L. Bernstein
(UC Berkeley, LBNL)
Fission Measurements at Berkeley using FLUFFY and GENESIS
16:30 - 17:00 S. Marin
(U. Michigan)
Multiplicity correlations in the neutron-photon signature of fission fragments
Thursday, October 3
Time Speaker Title
09:00 - 10:30 Session: Evaluation (I)
(Chair: Minato)
09:00 - 09:30 G. Kessedjian
(CNRS / Grenoble)
From mass yield measurements to evaluation: status on statistical methodology for the covariance question
09:30 - 10:00 M. Mumpower
The Los Alamos fission yield evaluation pipeline
10:00 - 10:30 A. Lovell
Quantified uncertainties of fission yields from machine learning
10:30 - 11:00 Break
11:00 - 12:00 Session: Evaluation (II)
(Chair: Kessedjian)
11:00 - 11:30 A. Koning
Status and future options of TALYS for fission yields and other related observables
11:30 - 12:00 F. Minato
Recent activities for next JENDL decay and fission product yield data
12:00 - 14:00 Lunch
14:00 - 15:30 Session: Evaluation (III)
(Chair: Talou)
14:00 - 14:30 A. Sonzogni
Development of cumulative fission yield covariances for nuclear reactor antineutrino spectrum and yield uncertainty quantification
14:30 - 15:00 D. Neudecker
Templates of expected uncertainties for fission measurements
15:00 - 15:30 E. Matthews
(UC Berkeley)
A method for generation of fission yield covariance matrices
15:30 - 16:00 Break
16:00 - 16:45 General discussion
16:45 - 17:00 Closing session
Friday, October 4
All day Closed Session at Los Alamos
(invitation only)

Contact the Organizers

T. Kawano, P. Talou, T. Bredeweg, I. Stetcu, M. Gooden, M. Mumpower, & M. White

+1 (505) 667-4835