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californium
Californium Informationen, einschließlich Technische Daten, Safety Data und seine Eigenschaften, Forschung, Anwendungen und andere nützliche Fakten sind erörtert werden. Wissenschaftliche Fakten, wie die atomare Struktur, Ionisierungenergie, Fülle auf der Erde, Leitfähigkeit und thermischen Eigenschaften sind im Preis inbegriffen.

 

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Californium ist ein Block F, Gruppe 3, Periode 7 Element. Die elektronische Konfiguration [Rn] 5f10 7s2. In seiner elementaren Form Californium's CAS-Nummer ist 7440-71-3. Die Californium Atom hat einen Radius von 186.pm und es ist, Van der Waals Radius ist 200.pm.

Californium wurde von Stanley G. Thompson, Kenneth Street Jr. und Albert Ghiorso 1950.

 

 

French Californium German Californium Italian Californio Portuguese califórnio Spanish Californium Swedish Californium

Californium Safety Data. The safety data for californium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.

Ionisation Energie. Die Ionisierungenergie für californium (die am wenigsten Energie benötigt, um ein einzelnes Elektron aus dem Atom in seinem Grundzustand in der Gasphase) ist in der folgenden Tabelle dargestellt:

1st Ionization Energy
607.86 kJ mol-1
2nd Ionization Energy
- kJ mol-1
3rd Ionization Energy
- kJ mol-1

Conductivity. As to californium's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is - µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is -. The thermal conductivity of californium is - W m-1 K-1.

Thermal Properties of Californium. The melting point and boiling point for californium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.

Heat of Fusion
- kJ mol-1
Heat of Vaporization
- kJ mol-1
Heat of Atomization
175 kJ mol-1



 
Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point
Boiling Point
Vanderwaals radius
Ionic radius Energy of first ionization
Cf 98 (251)  g.mol -1 - - g/L 900 °C - °C .200 nm - pm 607.86 kJ.mol-1

PRODUCT CATALOG German Operations Submicron & Nanopowder Tolling Ultra High Purity Sputtering Target Crystal Growth Rod, Plate, Powder, etc. Foil
 
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Recent Research & Development for Californium

  • Fast neutron spectrometry and dosimetry using a spherical moderator with position-sensitive detectors. Radiat Prot Dosimetry. 2007;123(1):15-20. Epub 2006 Jul 4.

  • Neutron-based sterilization of anthrax contamination. Health Phys. 2006 May;90(5 Suppl):S80-4.

  • First structural determination of a trivalent californium compound with oxygen coordination. Inorg Chem. 2006 Jan 23;45(2):475-7.

  • A radiobiological model for the relative biological effectiveness of high-dose-rate 252Cf brachytherapy. Radiat Res. 2005 Sep;164(3):319-23.

  • Measured microdosimetric spectra and therapeutic potential of boron neutron capture enhancement of 252Cf brachytherapy. Radiat Res. 2005 Sep;164(3):312-8.

  • [The preliminary report of cervical cancer treated with californium-252 neutron after loading intracavitary radiotherapy] Zhonghua Fu Chan Ke Za Zhi. 2001 Dec;36(12):742-4. Chinese.

  • Some more new etchants for CR-39 detector. Radiat Meas. 2005 Oct;39(5):551-5.

  • Hypoxic versus normoxic external-beam irradiation of cervical carcinoma combined with californium-252 neutron brachytherapy. Comparative treatment results of a 5-year randomized study. Strahlenther Onkol. 2005 May;181(5):273-84.

  • Discovery of new etchants for CR-39 detector. Radiat Meas. 2005 Jun;39(3):337-43.

  • The angular dependence of an Si energy deposition spectrometer response at several radiation sources. Radiat Meas. 2005 Jun;39(3):323-7.

  • Shielding evaluation of a medical linear accelerator vault in preparation for installing a high-dose rate 252Cf remote afterloader. Radiat Prot Dosimetry. 2005;113(4):428-37. Epub 2005 Mar 8.

  • Neutron flow exposure as a test for survival of Artemia salina spores. Bull Exp Biol Med. 2004 Nov;138(5):470-4.

  • A comparison of the expected costs of high dose rate brachytherapy using 252Cf versus 192Ir. Appl Radiat Isot. 2004 Dec;61(6):1211-6.

  • First microdosimetric measurements with a TEPC based on a GEM. Radiat Prot Dosimetry. 2004;110(1-4):839-43.

  • Compound dual radiation action theory for 252Cf brachytherapy. Radiat Prot Dosimetry. 2004;110(1-4):801-6.

  • Characteristics of the simulated workplace neutron fields using a 252Cf source surrounded with cylindrical moderators. Radiat Prot Dosimetry. 2004;110(1-4):117-21.

  • Moderated 252Cf neutron energy spectra in brain tissue and calculated boron neutron capture dose. Appl Radiat Isot. 2004 Nov;61(5):753-7.

  • Development of a thermal neutron sensor for Humanitarian Demining. Appl Radiat Isot. 2004 Jul;61(1):59-66.

  • [Comparison of effectiveness of treatment for cervical carcinoma using different brachytherapy equipment] Vopr Onkol. 2004;50(1):55-60. Russian.

  • Dietary nucleosides and nucleotides do not affect tumor incidence but reduce amyloidosis incidence in B6C3F1 mice irradiated with californium-252. Nutrition. 2004 Apr;20(4):383-9.

 

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