A T O M I C M A S S E V A L U A T I O N ********* A - GENERAL INFORMATION ********* ********* A - GENERAL INFORMATION ********* (November 28, 1995) I - INTRODUCTION The table of masses and the table of nuclear reaction and separation energies resulting from the evaluation published in: ------------------------------------------------- | "THE 1995 UPDATE TO THE ATOMIC MASS EVALUATION" | | | | (Ame'95) | | | | by G. Audi and A.H. Wapstra | | | | Nuclear Physics A595 (1995) 409-480. | | | | (December 25, 1995) | ------------------------------------------------- are available electronically at the ``Atomic Mass Data Center" (AMDC) and at the Nuclear Data Centers. Six files from this evaluation can be obtained: mass_rmd.mas95 Recommended masses rct1_rmd.mas95 Recommended reaction energies, table 1 rct2_rmd.mas95 Recommended reaction energies, table 2 mass_exp.mas95 Experimental masses rct1_exp.mas95 Experimental reaction energies, table 1 rct2_exp.mas95 Experimental reaction energies, table 2 Most readers can best use the set of recommended tables (labelled with `rmd') whereas the more specialized user could with benefit analyze the second set (with label `exp'). The first file, mass_rmd.mas95, contains the table of masses as printed in the reference above, plus the binding energies, the beta-decay energies and the atomic masses. The next two files correspond to the table of reaction and separation energies (cf. "The 1993 Atomic Mass Evaluation", part II) in two parts of 6 entries each: rct1_rmd.mas95 for S2n, S2p, Q(a), Q(2B), Q(ep), Q(B-n) rct2_rmd.mas95 for Sn, Sp, Q(4B), Q(d,a), Q(p,a), Q(n,a) The last three files with names mass_exp.mas95, rct1_exp.mas95 and rct2_exp.mas95 are identical to the first three files except for the values resulting from the use of the few deviating experimental data, listed in Table~B of Ame'93 and updated in Table~IV-a of Ame'95. Values in these files are exact (unrounded) copy of the published ones. * They can conveniently be used for calculations. * They should not be copied in a publication as given in these files, but instead, rounded values, as published in the above Journal should be used. References: Ame'93 = "The 1993 atomic mass evaluation" by G.Audi and A.H.Wapstra Nuclear Physics A565 (1993) 1-397. II - VALUES FOR THE MOST PRECISE CALCULATIONS: a - values for the most precise masses: Mass excess (keV) Atomic mass (micro-u) 1 n 8071.32281 0.00215 1008664.92326 0.00221 1 H 7288.96940 0.00064 1007825.03214 0.00035 2 H 13135.71961 0.00104 2014101.77799 0.00036 3 H 14949.79417 0.00149 3016049.26753 0.00106 3 He 14931.20356 0.00138 3016029.30970 0.00086 4 He 2424.91109 0.00095 4002603.24968 0.00100 13 C 3125.01081 0.00095 13003354.83780 0.00099 14 C 3019.89233 0.00374 14003241.98845 0.00400 14 N 2863.41701 0.00083 14003074.00524 0.00086 15 N 101.43823 0.00085 15000108.89844 0.00092 16 O -4736.99828 0.00147 15994914.62211 0.00153 20 Ne -7041.92974 0.00192 19992440.17589 0.00198 28 Si -21492.79309 0.00244 27976926.53273 0.00196 40 Ar -35039.88974 0.00387 39962383.12324 0.00305 b - values for the correlation coefficients (in nano-amu**2) n H D 3H 3He 4He 4.899380 -0.083048 0.123414 0.092465 0.040200 0.132764 0.014840 -0.000165 0.014699 1.114100 0.006104 0.002664 0.008774 0.446509 0.733021 -0.000036 0.000001 -0.000001 0.000000 0.000000 0.999982 c - values for precise mass differences (in keV) of use in deriving reaction energies other than those given in files rct1.... and rct2.... (cf. Ame'93, p.68-69): a-2d : -23846.5281 0.0021 3He-t : -18.5906 0.0009 p-n : -782.3534 0.0021 p+n-d : 2224.5726 0.0020 p+2n-t : 8481.8209 0.0043 p-a+t : 19813.8525 0.0020 p+d-3He : 5493.4854 0.0010 2p+n-3He : 7718.0580 0.0023 -a+n+3He : 20577.6153 0.0029 d+n-t : 6257.2483 0.0024 a-d-p-n : -26071.1007 0.0030 a-d+p-3He : -18353.0427 0.0019 a-d+n-t : -17589.2799 0.0028 III - FORMAT: All files are 2931 lines long with 124 character per line (originally in fixed format). Headers are 39 lines long. Record Format: 1 - For mass-files: Column Format Quantity 1:1 a1 fortran control character (a) 2:4 i3 N-Z neutron excess 5:9 i5 N neutron number 10:14 i5 Z atomic number 15:19 i5 A mass number 20:20 1x 21:23 a3 Chem Symbol 24:27 a4 origin 28:28 1x 29:39 f11.3 mass 40:48 f9.3 mass accuracy 49:59 f11.3 binding energy 60:68 f9.3 binding energy accuracy 69:72 4x 73:74 a2 B+ or B- 75:85 f11.3 beta decay energy 86:94 f9.3 beta decay energy accuracy 95:96 2x 97:110 i3,1x,f10.3 atomic_mass 111:119 f9.3 atomic mass accuracy 2 - For rct-files : Column Format Quantity 1:1 a1 fortran control character (a) 2:4 i3 A mass number 5:5 1x 6:8 a3 Chem Symbol 9:11 i3 Z atomic number 12:12 1x 13:30 f10.2,f8.2 energy 1, accuracy 1 31:48 f10.2,f8.2 energy 2, accuracy 2 49:66 f10.2,f8.2 energy 3, accuracy 3 67:84 f10.2,f8.2 energy 4, accuracy 4 85:102 f10.2,f8.2 energy 5, accuracy 5 103:120 f10.2,f8.2 energy 6, accuracy 6 Notes: a- Fortran control character: 1 = page feed 0 = line feed b- decimal point is replaced by # for values derived from systematical trends (see publications). c- * in place of value means `not calculable' IV - CORRECTIONS AND SUGGESTIONS If you find errors or omissions in the present documentation, or, if you have a suggestion to make it clearer, please send a message to the following electronic address. Thanks in advance. internet : audi@frcpn11.in2p3.fr ********* B - A.M.D.C. ********* ********* B - A.M.D.C. ********* COPYING OF FILES THROUGH NETWORKS: The six files of the Ame'95, along with a documentation file "readme.mas95", may be obtained via an anonymous account on the Atomic Masses Data Center (AMDC) HP-Unix computer through TCP/IP network protocol. These files are located in the subdirectory pub/AMDC. They may be copied on to the user's computer using the FTP "get" command. The user name of the anonymous account is "anonymous" (enter your e-mail address as the password). Example: ftp csn-hp.in2p3.fr user: anonymous password: your electronic address cd pub cd AMDC (please type AMDC in capitals) get readme.mas95 get mass_rmd.mas95 quit II - ADDRESS Address: Atomic Mass Data Center C.S.N.S.M. (IN2P3-CNRS) Batiment 108 91405 Orsay campus (France) Telephone: +33 (1) 69.41.52.23 Telefax: +33 (1) 69.41.52.68 E-mail: audi@frcpn11.in2p3.fr (internet) ********* C - NNDC (USA and Canada) ********* ********* C - NNDC (USA and Canada) ********* I - COPYING OF FILES THROUGH NETWORKS: The six mass files may be obtained via an anonymous account on the NNDC DEC Alpha computer through TCP/IP network protocol. These six files, along with a documentation file "README.MAS95", are located in the subdirectory SA2:[PUBLIC.MASSES]. These may then be copied on to the user's computer using the FTP "GET" command. The user name of the anonymous account is ANONYMOUS (Enter your e-mail address as the password): ex: ftp bnlnd2.dne.bnl.gov User (identify yourself to the host): anonymous Password: enter your e-mail address as the password Command: cd masses Command: get mass_rmd.mas95 Command: quit II - ATOMIC MASSES FROM NNDC ON-LINE SYSTEM: 1 - Access to the On-Line service: One can access the NNDC (National Nuclear Data Center, Brookhaven National Laboratory, USA) On-Line service through a network or a remote modem. The service is available on an NNDC VAX Alpha computer. Presently, there is no charge for the On-Line service. Via modem: The NNDC VAX Alpha computer can be accessed via modem using the telephone number 516-282-2002. After getting the connect signal, type a carriage return, wait and then type a second carriage return. The VAX login prompt should then appear on your terminal. Via networks: * TCP/IP (internet): use the `TELNET' command to access the computer node BNLND2. Its address is BNLND2.DNE.BNL.GOV (or 130.199.112.132) * DECNET: use the `SET HOST' command with address BNLND2 (or 44436 or 43.404) The VAX login prompt will appear and you should proceed as follows: * Username: NNDC * Enter NNDC assigned authorization code (or GUEST):GUEST (or your authorization code if you have one) The authorization code "GUEST" allows a new user limited amount of CPU time to become acquainted with the system. 2 - Retrievals or Copying of files: Once you are logged into NNDC online service you can retrieve from various different numerical or bibliographic data bases, or simply copy files containing computer codes, documentation, or mass tables. In order to copy files containing mass tables you will proceed as the following: After successful login select the option FILES. Within this option select the data item MASSES and indicate which of the six files and documentation you will like to copy over to your computer. After the selection of file(s) you will automatically be in SEND option and you will be asked which network you will want to use to transfer your file(s). After that the system will query you about your destination address, your password (it does not echo), and the file name that you are transferring. The system will respond if the transfer was successful. You can then choose to do further retrievals or logout. 3 - Logout: When terminating a retrieval session, enter or select LOGOUT. 4 - Authorization: For authorization for access to NNDC online service, user can supply the necessary information while logged in with 'GUEST' authorization as indicated above or write to NNDC at the following address: Address: On-Line access National Nuclear Data Center Brookhaven National Laboratory Building 197D P.O. Box 5000 Upton, NY 11973-5000 (U.S.A.) Telephone: 516-282-2901. Telefax: 516-282-2806 E-mail: nndc@bnl.gov (internet) bnl::nndc (hepnet) Please give your name, postal and e-mail addresses, telephone number, your affiliation, and a personal code of six or fewer characters which will serve as your authorization code. III - ATOMIC MASSES FROM NNDC WORLD WIDE WEB SITE: 1 - URL: http://www.dne.bnl.gov/nndc.html 2 - Select 1995 Audi-Wapstra Atomic Masses under Programs, Data Files and Manuals. 3 - Click on a file name to view it or shift-click to down- load the file. **** D - NEA-DB (Western Europe, Mexico, Korea, Japan) **** **** D - NEA-DB (Western Europe, Mexico, Korea, Japan) **** I - WORLD WIDE WEB URL: http://www.nea.fr/ Select Data Bank Select Experimental data (EXFOR, ... MASSES) Select File(s) required II - FTP Ftp to ftp.nea.fr login ANONYMOUS password is user's e-mail address cd data mget mass* or mget rct* (file names are given in Section A-I) exit III - E-MAIL Send an e-mail to: nearobot@nea.fr In the body of the message type "index" to get the list of filenames or "get filename" where filename is one of: masses-info.txt mass_rmd_mas95.txt rct1_rmd_mas95.txt rct2_rmd_mas95.txt mass_exp_mas95.txt rct1_exp_mas95.txt rct2_exp_mas95.txt IV - TELNET 1 - Access to the On-Line service: Logging on: logon as NEADB and give your assigned user name and password or use the GUEST name for a limited time. Internet: DB.NEA.FR (numeric = 193.51.64.1) 2 - Retrievals or Copying of files: On logging-on to our On-Line service, the user has to select first the option "Nuclear Data". Under "Nuclear Data" there is a menu called MASSES. When this option is selected, the description of the files and their content will appear on the screen, ending with a question asking: "Which file or files would you like to retrieve?" The selected files will automatically be transmitted to the user home computer. 3 - Logout: When terminating a retrieval session, enter or select LOGOUT. 4 - Authorization (not required): Address: Nuclear Energy Agency - Data Bank O.E.C.D. Le Seine Saint Germain 12, boulevard des Iles 92130 Issy-les-Moulineaux France Telephone: +33 (1) 45.24.10.71 Telefax: +33 (1) 45.24.11.10 E-mail: nea@nea.fr (internet) ********* E - IAEA (other countries) ********* ********* E - IAEA (other countries) ********* I - COPYING OF FILES THROUGH NETWORKS: The six mass files may be obtained via an anonymous account on the NDS AlphaServer 2100-4/275 computer through TCP/IP network. These six files, along with a documentation file "README.MAS95", are located in the subdirectory {SCR.MASSES}. These may then be copied on to the user's computer using the FTP "GET" command. Use the 'FTP' command to connect to: iaeand.iaea.or.at The user name of the anonymous account is "NDSOPEN". Ex: ftp iaeand.iaea.or.at user (identify yourself to the host): ndsopen cd masses get mass_rmd.mas95 quit II - ATOMIC MASSES FROM IAEA ON-LINE SERVICES: 1 - Access to the On-Line service: Use the TCP/IP (internet) network. TELNET iaeand.iaea.or.at Username: IAEANDS Enter NDS assigned authorization code (or GUEST): GUEST (or your authorization code if you have one) 2 - Retrievals or Copying of files: Identical to the system of the US National Data Center. (see C - II - 2 above) 3 - Logout: When terminating a retrieval session, enter or select LOGOUT. 4 - Authorization: As a "GUEST", you will have 30 seconds of CPU allocated. At the end of a GUEST session, you may sign up directly for an authorization code for full access service. Or you may contact the IAEA Nuclear Data Section for assignment of an authorization code. Address: Nuclear Data Section NDIS Manager International Atomic Energy Agency P.O.Box 100 A-1400 Vienna, Austria Telephone: +43 1 2360 1715 Telefax: +43 1 2345 64 Telex: 1-12645 ATOM A E-mail: online@iaeand.iaea.or.at (internet)