Transcript 93rd session of the JINR Scientific Scientific Council

95th session of the JINR
Scientific Council
PAC for Nuclear Physics
19th meeting, 13–14 November
2003
95 session of Scientific Council
HEAVY-ION PHYSICS
•
•
Latest results on SHE
synthesis
The PAC congratulates
the Flerov Laboratory of
Nuclear Reactions on the
recent success in the synthesis
of the new elements with
Z=113 and Z=115 in the 48Ca
+ 243Am reaction. The very
successful programme on
SHE synthesis and
investigations should be
continued with first priority.
•
•
Activity with gamma rays at
FLNR
The proposed Dubna–
IN2P3 collaboration on
Gamma spectroscopy of the
heaviest elements is
welcomed. Around one
month’s beam time will be
devoted to the first phase of
the project (recoil
implantation) in 2004.
Feasibility studies for the
second phase (recoil decay
tagging) using the full beam
intensity of U400 should be
undertaken as early as
possible.
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The PAC is impressed by the research programme outlined for
FLNR for the years 2004–2006.
This programme will guarantee continued leadership in this
field.
PAC approves this programme, acknowledges its scientific
merits and recommends it with high priority.
Adequate funds should be provided.
• The synthesis of
superheavy elements
including reaction
studies, and the
investigation of their
nuclear and chemical
properties. The detection
of gamma rays as a new
spectroscopic tool is
especially appreciated.
• The production and
structure studies of light
radioactive nuclei
including reaction
studies, elastic scattering,
and fusion-fission with
6He.
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Scientific Programme
Experiments scheduled for 2004
• U400:
– Synthesis of the element 118 in reaction
249Cf+48Ca;
– Chemical isolation of 268Db produced in
reaction 243Am+48Ca;
– Synthesis of the isotopes 281,282113 in reaction
237Np+48Ca;
– Study of chemical properties of the elements
112 and 114 produced in reaction 244Pu+48Ca;
– γ-spectroscopy of No-isotopes.
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U400M
– neutron correlations in 8He;
– RIB production on COMBAS.
DRIBs
– Elastic scattering of 6He;
– Fission reaction 238U+6He.
Accelerator
The PAC appreciates the satisfactory running time of
the FLNR cyclotrons in 2003. The required beam time of 4500 hrs at
U400, 1800 hrs at U400M and 1800 hrs for the U400+U400M mode
must be fully allocated in 2004 to benefit from the unique possibilities
of the accelerator complex and the dedicated instrumentation.
• Facilities development in 2004
The upgrade and modernization of the U400 accelerator should be
completed with particular urgency.
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FLNR in the field of heavy ion
physics for 2004-2006.
• 11 projects in the framework of three
themes:
 
Synthesis of New Nuclei and Study of Nuclear
Properties and Heavy Ion Reaction Mechanisms (9 projects);
 
Development of the FLNR Cyclotron Complex for
Producing Intensive Beams of Accelerated Ions of Stable and
Radioactive Isotopes (2 projects);
 
Development and Construction of the Accelerator
Complex for Producing Radioactive Ion Beams (Project
DRIBs).
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To maintain the attractiveness of the FLNR basic set-ups in the future,
it is necessary to realize the DRIBs project in its entirety without
further delay, and to implement Phase I of the project during 2004.
The necessary funds should be delivered to the project on time.
The PAC discussed in detail the research programme and
recommends extension of these activities with first priority in
2004–2006. Within the theme “Synthesis of New Nuclei and
Study of Nuclear Properties and Heavy-Ion Reaction Mechanisms”,
first priority should be given to the MASHA separator and to the
continuous improvement and upgrade of the separators
DGFRS, VASSILISSA, ACCULINNA, and COMBAS.
These detector systems are essential for ongoing research.
CORSET and MULTI should also be financed with high priority.
FOBOS should be regarded as second priority.
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Plans and reality for 2003
PLANS OF THE IREN PROJECT FOR YEAR 2003
initially formed to match main task of the approved time-table:
START-UP IREN FACILITY BY THE END OF 2005
It was foreseen to realize simultaneously of the three main tasks:
Dismantling of IBR-30 reactor to open way for obtaining license
for construction of the IREN facility
Completing the technological project of the facility and choice
of producers of multiplying target systems
Mounting of LUE-200 in Bld. 43 FLNP
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Plans and reality for 2003
Realization of these plans needed ~650K$
including reimbursement of JINR debts
for years 2001-2002
Finally JINR directorate has assigned
following grants for year 2003:
Dismantling IBR-30requested)
80 k$ (100% of
30 k$
Project IREN
requested)
50 k$ (~10% of
-
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Dismantling of IBR-30:
results and perspectives for year 2004
• In the beginning of 2003 detailed plan of
activity for dismantling of IBR-30 had been
prepared and approved by JINR
directorate
• All points of this plan being on
responsibility of FLNP and JINR
workshop were fulfilled
• But due to lack of financing bld.117/6 was
not fully equipped and we could not get
license for its exploitation
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Construction of LUE-200
• Now there is a good start position for
completing during next year of the
first stage of LUE-200 linac
if of course necessary funding will be
available in time…
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Perspectives for year 2004 and
further
• Total investment into IREN project by
the end of 2003 should be near 2.2
M$
• Last estimation of GSPI for total cost
of the IREN facility is 4.5- 5 M$
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Perspectives for year 2004 and
further
• Only possibility to complete a creation
of the IREN source is to get external
financing
• Very promising perspective in this
direction were appeared due to
probable collaboration with Kurchatov
institute
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Status of IREN
The PAC noted that complementary financing for
the
IREN project
is sought through the Kurchatov Institute and
MINATOM.
Recommendation. The PAC proposes that the project
be presented again in due course,
with updated schedules and planning.
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LOW- AND INTERMEDIATE-ENERGY
PHYSICS
• Results of GENIUS-TF tests
•
The PAC heard with interest a report on first
results of the JINR-Heidelberg project “Dark Matter
search with GENIUS-TF”. Successful operation of
the first four Ge-detectors was demonstrated with
unprecedented levels of background suppression.
• Recommendation - continuation of this impressive
experiment with high priority, and looks forward to
hearing about further progress at a future meeting.
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LEPTA
scheme
Septum
Collecto
r
e-gun
e+ trap
e+ source
Quadrupole
Cooling section
B
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Detector
Research programme at LEPTA
• The PAC heard with interest some aspects of
physics with positronium. These included
properties of its bound states, experimental
limits on P, CP and CPT conservation, and the
search for axions. The PAC encourages the
development of concrete ideas for future
experiments in parallel with the progress of
the LEPTA facility.
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Proposal of the new project
“Investigation of the nuclear fusion reaction in muonic deuterium
and tritium”
(Mu-CATALYSIS)
The PAC believes that all proposed experiments will yield important
new results, which can be obtained only at Dubna using the existing
facility and new target technology from Sarov.
In particular, at the Phasotron, the d-t fusion experiment carries
the promise of elucidating the complicated but important d-μ-t kinetic cycle.
With respect to radiative d-d fusion, there is concern that the
expected statistics
(10 events, 2-3 background) may be too marginal.
Therefore, this experiment should be started as a feasibility test,
e.g. using the p-t fusion channel as a gamma source.
Recommendation - approval of the Mu-CATALYSIS project with
high priority, under the above proviso for radiative d-d fusion.
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Scientific programme
The activities at the Dzhelepov Laboratory of Nuclear Problems,
comprise three themes of research:
– “Investigation of Fundamental Interactions in Nuclei at Low
Energies”
– “Nucleus and Particle Interactions at Intermediate Energies”
– “Improvement and Development of the JINR Phasotron for
Fundamental and Applied Research”.
The PAC was impressed by the diversity of topical projects on neutrino
physics (NEMO, TGV, GENIUS, GEMMA, etc.),
particle physics
(PIBETA, ANKE COSY, CATALYSIS, ANCOR, DUBTO, MUON, etc.)
and accelerator developments.
Recommendation - extension of the activities within these themes with
first priority until the end of 2006.
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THEORETICAL PHYSICS
Scientific Programme
The main results obtained at the Bogoliubov Laboratory of
Theoretical Physics within the theme
“Theory of Nuclei and Other Finite Systems” during the period 1999–2003.
•The high quality of the research on nuclear structure under extreme
conditions,
dynamics and manifestation of structure in nuclear and mesoscopic
systems,
few-body physics, and relativistic nuclear dynamics is recognized.
•An important aspect of this work is the
direct support to JINR experimental activities.
•Close contacts and cooperation with the University Centre
are also highly appreciated.
•The quality, knowledge, and experience of the research staff as well as
the trends in the age structure of the BLTP groups give a good basis
for successful continuation of these investigations.
Recommendation - extension of the theme“Theory of Nuclei and
Other Finite Systems” with first priority until the end of 2008.
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Over the past five years, the UC's total
graduate enrolment was 600 students from
higher education institutions of JINR
Member States.
Distribution of the UC students by year
140
120
100
80
60
40
20
0
1998
1999
2000
2001
2002
2003
The UC’s teaching staff totals over 50
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Up to now, 135 people have completed the JINR
postgraduate programmes.
Distribution of the UC postgraduates by year
70
60
50
40
30
20
10
0
1998
1999
2000
2001
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2002
2003
http://uc.jinr.ru/schools.htm
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JINR EDUCATIONAL
PROGRAMME
The education and training of young specialists is of
vital importance for the future of JINR. In this respect,
the activities of the University Centre are highly
appreciated.
The PAC supports the UC’s initiative to organize
regularly summer physics practical courses for students
from Member States.
Recommendation. The PAC recommends extension of
the theme “Organization, Maintenance, and
Development of the University-Type Educational
Process at JINR” first priority until the end of 2008.
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SCIENTIFIC REPORTS
The PAC heard with enthusiasm the report “Quantum
optics with UCN: recent experimental results and
perspectives” by A. Frank. Recent, impressive results of
experiments with ultra-cold neutrons were presented and
future experiments were proposed.
The PAC heard with interest the report “Pulsed neutron
sources for physics research” presented by Yu. Stavisski.
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