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1.
M. Mukherjee D. Beck K. Blaum G. Bollen J. Dilling S. George F. Herfurth A. Herlert A. Kellerbauer H. -J. Kluge S. Schwarz L. Schweikhard C. Yazidjian 《The European Physical Journal A - Hadrons and Nuclei》2008,35(1):1-29
ISOLTRAP is a Penning trap mass spectrometer for high-precision mass measurements on short-lived nuclides installed at the
on-line isotope separator ISOLDE at CERN. The masses of close to 300 radionuclides have been determined up to now. The applicability
of Penning trap mass spectrometry to mass measurements of exotic nuclei has been extended considerably at ISOLTRAP by improving
and developing this double Penning trap mass spectrometer over the past two decades. The accurate determination of nuclear
binding energies far from stability includes nuclei that are produced at rates less than 100 ions/s and with half-lives well
below 100ms. The mass-resolving power reaches 107 corresponding to 10keV for medium heavy nuclei and the uncertainty of the resulting mass values has been pushed down to below
10-8. The article describes technical developments achieved since 1996 and the present performance of ISOLTRAP. 相似文献
2.
Magdalena Kowalska 《Hyperfine Interactions》2010,196(1-3):199-203
Since 2006 the ISOLTRAP mass spectrometer has provided high-precision masses of many short-lived nuclides located all across the nuclear chart with half-lives down to a few 10 ms. These nuclides range from the two-proton halo candidate 17Ne, via the neutron-rich magic 80Zn and 132Sn, up to 229Rn which was identified for the first time. The results show that ISOLTRAP is a versatile tool well suited to address physics topics such as nuclear structure, stellar nucleosynthesis, or the weak interaction. 相似文献
3.
Through the nuclear binding energy, the atomic mass gives us important information about nuclear structure. Viewing the ensemble
of mass data over the nuclear chart, we can examine the hills and valleys that form this surface and make hypotheses about
the effects of certain nuclear configurations. To unveil these effects, mass measurements of very high precision (<10−6) are required. Two experiments at ISOLDE pursue this effort of nuclear cartography: the tandem Penning trap spectrometer
ISOLTRAP and the radiofrequency transmission spectrometer MISTRAL. Between them, the masses of almost 150 nuclides have been
measured from stable isotopes to those with half-lives as short as 30 ms. Both experiments rely on good optical properties
of a low energy ion beam and are thus well suited to the ISOLDE facility.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
4.
Herfurth F Dilling J Kellerbauer A Audi G Beck D Bollen G Kluge HJ Lunney D Moore RB Scheidenberger C Schwarz S Sikler G Szerypo J 《Physical review letters》2001,87(14):142501
Mass measurements on (33,34,42,43)Ar were performed using the Penning trap mass spectrometer ISOLTRAP and a newly constructed linear Paul trap. This arrangement allowed us, for the first time, to extend Penning trap mass measurements to nuclides with half-lives below one second ( 33Ar: T(1/2) = 174 ms). A mass accuracy of about 10(-7) (deltam approximately 4 keV) was achieved for all investigated nuclides. The isobaric multiplet mass equation was checked for the A = 33, T = 3/2 quartet and found to be inconsistent with the generally accepted quadratic form. 相似文献
5.
A. Toyoda K. Ishida K. Shimomura Y. Matsuda W. Higemoto S. N. Nakamura T. Matsuzaki K. Nagamine 《Hyperfine Interactions》2001,132(1-4):307-312
Recently, the applicability of Penning trap mass spectrometry has been extended to nuclides with a half-life of less than
one second. The mass of 33Ar (T
1/2=174 ms) was measured using the ISOLTRAP spectrometer with an accuracy of 4.2 keV. This measurement provided a stringent test
of the Isobaric Multiplet Mass Equation (IMME) at mass number A=33 and isospin T=3/2. The fast measurement cycle that shows the way to other measurements of very-short-lived nuclides is presented. Furthermore,
the results of the IMME test are displayed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
6.
F. Herfurth G. Audi D. Beck K. Blaum G. Bollen P. Delahaye M. Dworschak S. George C. Guénaut A. Kellerbauer D. Lunney M. Mukherjee S. Rahaman S. Schwarz L. Schweikhard C. Weber C. Yazidjian 《The European Physical Journal A - Hadrons and Nuclei》2011,47(6):1-9
High-accuracy mass measurements have been performed with the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. The short-lived nuclides 70, 71, 72, 73Se , 72, 73, 74, 75Br , and 98, 99, 100, 101, 103Ag have been measured with an average uncertainty of a few keV. The data are important input for nucleosynthesis calculations of the rp-process beyond Z = 32 . 相似文献
7.
A. Kellerbauer G. Bollen J. Dilling S. Henry F. Herfurth H.-J. Kluge E. Lamour D. Lunney R.B. Moore C. Scheidenberger S. Schwarz G. Sikler J. Szerypo 《Hyperfine Interactions》2001,132(1-4):507-511
With the Penning trap mass spectrometer ISOLTRAP, close to 200 nuclides have already been investigated and their masses determined
with a typical relative precision of δm/m=10−7. Recently, ISOLTRAP's beam preparation system was replaced by an RFQ ion beam cooler and buncher. The principle and the characteristics
of this new beam preparation system will be presented. It is planned to use ions of various carbon clusters C+
n
(n>1) as reference ions for mass measurements. Apart from negligible molecular binding energies, these clusters have masses
that are exact multiples of the unified atomic mass unit. This will allow ISOLTRAP to carry out absolute mass measurements
as well as to investigate possible mass-dependent systematic errors. The results of tests of the production, transport, and
trapping of such carbon clusters will be presented.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
8.
M. Kowalska S. Naimi J. Agramunt A. Algora G. Audi D. Beck B. Blank K. Blaum Ch. B?hm M. Breitenfeldt E. Estevez L. M. Fraile S. George F. Herfurth A. Herlert A. Kellerbauer D. Lunney E. Minaya-Ramirez D. Neidherr B. Olaizola K. Riisager M. Rosenbusch B. Rubio S. Schwarz L. Schweikhard U. Warring 《The European Physical Journal A - Hadrons and Nuclei》2009,42(3):351-359
With the Penning trap mass spectrometer ISOLTRAP, located at ISOLDE/CERN, preparatory work has been performed towards mass and decay studies on neutron-rich Hg and Tl isotopes beyond N = 126 . The properties of these isotopes are not well known because of large isobaric contamination coming mainly from surface-ionised Fr. Within the studies, production tests using several target-ion source combinations were performed. It was furthermore demonstrated around mass number A = 209 that the resolving power required to purify Fr is achievable with ISOLTRAP. In addition, masses of several isobaric contaminants, 211-213Fr and 211Ra , were determined with a three-fold improved precision. The results influence masses of more than 20 other nuclides in the 208Pb region. 相似文献
9.
G. Bollen F. Ames G. Audi D. Beck J. Dilling O. Engels S. Henry F. Herfurth A. Kellerbauer H.-J. Kluge A. Kohl E. Lamour D. Lunney R. B. Moore M. Oinonen C. Scheidenberger S. Schwarz G. Sikler J. Szerypo C. Weber 《Hyperfine Interactions》2001,132(1-4):213-220
Penning trap mass spectrometry has reached a state that allows its application to very short-lived nuclides available from
various sources of radioactive beams. Mass values with outstanding accuracy are achieved even far from stability. This paper
illustrates the state of the art by summarizing the status of the ISOLTRAP experiment at ISOLDE/CERN. Furthermore, results
of mass measurements on unstable rare earth isotopes will be given.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
10.
Robert N. Wolf Markus Eritt Gerrit Marx Lutz Schweikhard 《Hyperfine Interactions》2011,199(1-3):115-122
A multi-reflection time-of-flight mass separator (MR-ToF-MS) for the enhancement of the performance of the Penning-trap mass spectrometer ISOLTRAP at the on-line isotope separator ISOLDE/CERN has been built and investigated at an off-line test facility. The MR-ToF-MS consists of two ion-optical mirrors between which oscillating ions are separated according to their different mass-over-charge ratios m/q. Flight paths of several hundreds of meters are folded to an apparatus length of less than one meter. Preliminary tests resulted in a mass-resolving power of up to m/??m????80,000, and the separation was demonstrated for the isobaric ions CO?+? and $\mathrm{N}_2^+$ . The MR-ToF-MS will support the existing purification methods of ISOLTRAP and will extend the access to nuclides produced with high isobaric contamination yields at the ISOLDE facility. 相似文献
11.
J. Dilling G. Audi D. Beck G. Bollen F. Herfurth A. Kellerbauer H.-J. Kluge D. Lunney R.B. Moore C. Scheidenberger S. Schwarz G. Sikler J. Szerypo 《Hyperfine Interactions》2001,132(1-4):329-333
The masses of the xenon isotopes with 114≤A≤123 were directly measured for the first time. The experiments were carried out at the ISOLTRAP triple trap spectrometer
at the on-line mass separator ISOLDE/CERN. A mass resolving power of the Penning trap spectrometer of m/Δm≈500 000 was chosen and an accuracy of δm≈12keV for all investigated Xe isotopes was achieved. An atomic mass evaluation was performed and the results of this adjustment
are compared with theoretical predictions. The new results for the xenon isotopes and their effects on neighboring nuclides
are discussed within the two-neutron separation energy picture.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
12.
A. Kankainen V. S. Kolhinen V. -V. Elomaa T. Eronen J. Hakala A. Jokinen A. Saastamoinen J. Äystö 《The European Physical Journal A - Hadrons and Nuclei》2012,48(4):47
Penning-trap measurements on stable 92, 94-98, 100Mo isotopes have been performed with relative accuracy of \(\ensuremath 1\cdot 10^{-8}\) with the JYFLTRAP Penning-trap mass spectrometer by using 85Rb as a reference. The Mo isotopes have been found to be about 3keV more bound than given in the Atomic Mass Evaluation 2003 (AME03). The results confirm that the discrepancy between the ISOLTRAP and JYFLTRAP data for 101-105Cd isotopes was due to an erroneous value in the AME03 for 96Mo used as a reference at JYFLTRAP. The measured frequency ratios of Mo isotopes have been used to update mass-excess values of 30 neutron-deficient nuclides measured at JYFLTRAP. 相似文献
13.
M. Mukherjee D. Beck K. Blaum G. Bollen P. Delahaye J. Dilling S. George C. Guénaut F. Herfurth A. Herlert A. Kellerbauer H. -J. Kluge U. Köster D. Lunney S. Schwarz L. Schweikhard C. Yazidjian 《The European Physical Journal A - Hadrons and Nuclei》2008,35(1):31-37
Frequency ratio measurements with different combinations of the singly charged ions from 21, 22, 23Na , 22, 24Mg , and 37, 39K were performed at the on-line Penning trap mass spectrometer ISOLTRAP, CERN, Geneva. The masses and mass differences were
deduced with a relative uncertainty of about or even below one part in 108 for the ions of interest using a least-squares analysis of all measured relations. The results have direct consequences for
weak-interaction study as they give additional input to the test of CVC, and for nuclear astrophysics, because they help to
establish the minimum observable signal for a NeNa cycle in a nova burst. We report here about the measurements and the detailed
evaluation. 相似文献
14.
15.
H. Savajols 《Hyperfine Interactions》2001,132(1-4):243-252
16.
A. Kankainen 《Hyperfine Interactions》2011,199(1-3):221-230
Over 90 neutron-deficient nuclides between 10C and 111I have been measured at the JYFLTRAP mass spectrometer with a precision of better than 10 keV. Masses of these nuclides are important for modeling astrophysical rp and ??p processes and nucleosynthesis occurring in novae. Here, a review of the mass measurement programme of the neutron-deficient nuclides performed at JYFLTRAP for nuclear astrophysics studies is given. 相似文献
17.
A. Chaudhuri C. Andreoiu M. Brodeur T. Brunner U. Chowdhury S. Ettenauer A. T. Gallant A. Grossheim G. Gwinner R. Klawitter A. A. Kwiatkowski K. G. Leach A. Lennarz D. Lunney T. D. Macdonald R. Ringle B. E. Schultz V. V. Simon M. C. Simon J. Dilling 《Applied physics. B, Lasers and optics》2014,114(1-2):99-105
The introduction of Paul traps, in particular linear radio-frequency quadrupoles in the early 2000s, has revolutionized the use of ion traps for probing the properties of radioactive nuclides. It opened the path to trapping all available nuclides, independent of their chemical properties. We present an overview of direct mass measurements of short-lived nuclides using TITAN, a Penning trap mass spectrometer facility particularly suitable for precision measurements of ms-half-life nuclides. 相似文献
18.
《Nuclear Physics A》1999,651(1):3-30
Direct mass measurements of short-lived Cs and Ba isotopes have been performed with the tandem Penning trap mass spectrometer ISOLTRAP installed at the on-line isotope separator ISOLDE at CERN. Typically, a mass resolving power of 600 000 and an accuracy of δm ≈ 13 keV have been obtained. The masses of 123,124,126Ba and 122mCs were measured for the first time. A least-squares adjustment has been performed and the experimental masses are compared with theoretical ones, particularly in the frame of a macroscopic-microscopic model. 相似文献
19.
《Hyperfine Interactions》2001,132(1-4):491-495
SHIPTRAP will allow direct measurement of masses of transuranium nuclides. The method of choice is a Penning trap spectrometer
coupled to the SHIP (Separator for Heavy Ion Products) facility at GSI, Darmstadt. In this paper the impact of the SHIPTRAP
facility, with its capability of systematic mass measurements with high precision, is explored. Rather few masses of nuclides
above uranium are presently known experimentally. In the region of nuclides above Z=100 no ground state masses were measured directly. SHIPTRAP will play an important role in systematically mapping out this
area. Possible candidates for direct mass measurements, even with small or very small production cross sections, are presented.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
20.
D. Beck F. Ames G. Audi G. Bollen F. Herfurth H. -J. Kluge A. Kohl M. König D. Lunney I. Martel R. B. Moore H. Raimbault-Hartmann E. Schark S. Schwarz M. de Saint Simon J. Szerypo 《The European Physical Journal A - Hadrons and Nuclei》2000,8(3):307-329
Direct mass measurements of neutron-deficient rare-earth isotopes in the vicinity of 146Gd were performed with the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. This paper reports on the measurement of
more than 40 isotopes of the elements praseodymium, neodymium, promethium, samarium, europium, dysprosium and holmium, that
have been measured with a typical accuracy of
m
14 keV. An atomic mass evaluation has been performed taking into account other experimental mass values via a least-squares
adjustment. The results of the adjustment are discussed.
Received: 18 April 2000 / Accepted: 12 July 2000 相似文献